Data & Statistics

Problem 2301

3 Bestin Secret - Goo... www-awu.aleks.com Homework * $4: 7(1,2,3,4) 8(2,3,4)$ Home - Nort.... Content ChatGPT Chicago B. A Aleks - Jona... Failed to ope... Online Bettin... (5) KaiCe... Question 31 of 40 (1 point) I Question Attempt: 1 of 3 Jonathan $\checkmark 23$ 24 25 26 27 28 29 30 31 32 Españo
Working at home: According to the U.S. Census Bureau, $33 \%$ of men who worked at home were college graduates. In a sample of 474 women who worked at home, 155 were college graduates.
Part: 0 / 3
Part 1 of 3 (a) Find a point estimate for the proportion of college graduates among women who work at home. Round the answer to at least three decimal places.
The point estimate for the proportion of college graduates among women who work at home is $\square$ .

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Problem 2302

Satorit Vew History Bookmarks Window Holp PLC Sports Bettin. Secret - Goo.... 11/22/24 ATL. Home - Nort... www-awu-aleks.com Homework : $4: 7(1,2,3,4) 8(2,3,4)$ Question 32 of 40 (1 point) I Question Attempt: 1 of 3 2 23 24 25 26 27 28 29 30 Online Bettin... (5) Kaice... Jonathan
Sleep apnea: Sleep apnea is a disorder in which there are pauses in breathing during sleep. People with this condition must wake up frequently to breathe. In a sample of 420 people aged 65 and over, 114 of them had sleep apnea.
Part: $0 / 3$
Part 1 of 3 (a) Find a point estimate for the population proportion of those aged 65 and over who have sleep apnea. Round the answer to three decimal places.
The point estimate for the population proportion of those aged 65 and over who have sleep apnea is $\square$ Skip Part Check Save For Later Submit Assignment - 2024 MeGraw Hill LLC. All Rights Reserved. Torms of Use 1 Privacy Center I Accessiblity

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Problem 2303

Homework * 4: $7(1,2,3,4) 8(2,3,4)$ Question 32 of 40 (1 point) I Question Attempt: 1 of 3 Jonathan 2 23 24 25 26 28 29 30 $\checkmark 31$ $=32$ Español 33
Sleep apnea: Sleep apnea is a disorder in which there are pauses in breathing during sleep. People with this condition must wake up frequently to breathe. In a sample of 420 people aged 65 and over, 114 of them had sleep apnea.
Part 1 of 3 (a) Find a point estimate for the population proportion of those aged 65 and over who have sleep apnea. Round the answer to three decimal places.
The point estimate for the population proportion of those aged 65 and over who have sleep apnea is 0.271 .
Part 2 of 3 (b) Construct a $99.8 \%$ confidence interval for the proportion of those aged 65 and over who have sleep apnea. Round the answer to three decimal places.
A $99.8 \%$ confidence interval for the proportion of those aged 65 and over who have sleep apnea is $0.204<p<0.338$ .
Part: $2 / 3$
Part 3 of 3 (c) In another study, medical researchers concluded that more than $12 \%$ of elderly people have sleep apnea. Based on the confidence interval, does it appear that more than $12 \%$ of people aged 65 and over have sleep apnea? Explain.
Since all of the values in the confidence interval are $\square$ 0.12 , the confidence interval (Choose one) contradict the claim. $\square$ Skip Part Check Save For Later Submit Assignment - 2024 McGraw Hill LLC. All Rights Reserved. Terms of Use I Privacy Center I Accessibili

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Problem 2304

letting and Onlin. Sports Betting Secret --. Home - Northern Essex Content A Aleks - Jonathan Vcga... ChatGPT (5) KaiCenat - Twitch Homework : $4: 7(1,2,3,4) 8(2,3,4)$ Question 34 of 40 (1 point) | Question Attempt: 1 of 3 Jonathan 2 $\checkmark 23$ 24 25 26 27 28 29 31 Español $\checkmark 33$
Volunteering: The General Social Survey asked 1305 people whether they performed any volunteer work during the past year. A total of 522 people said they did.
Part: $0 / 3$
Part 1 of 3 (a) Find a point estimate for the proportion of people who performed voluntee work during the past year. Round the answer to at least three decimal places.
The point estimate for the proportion of people who performed volunteer work during the past year is $\square$ . Skip Part Check Save For Later Submit Assignment o 2024 McGraw Hill LLC. All Rights Resenved. Terms of Use II Privacy Center I Accessibility

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Problem 2305

www-awu.aleks.com d Onlin. Sports Betting Secret -... 11/22/24 ATL @ CHI /// St... Home - Northern Essex... Content A ALEKS - Jonathan Vega... ChatGPT (5) KaiCenat - T Homework * $4: 7(1,2,3,4) 8(2,3,4)$ Question 34 of 40 (1 point) I Question Attempt: 1 of 3 Jonathan 2 23 24 25 26 27 28 29 30 31 $\checkmark 32$ Españo 33
Volunteering: The General Social Survey asked 1305 people whether they performed any volunteer work during the past year. A total of 522 people said they did.
Part 1 of 3 (a) Find a point estimate for the proportion of people who performed volunteer work during the past year. Round the answer to at least three decimal places.
The point estimate for the proportion of people who performed volunteer work during the past year is $\square$ 0.4000
Alternate Answer: 0.4
Part: $1 / 3$
Part 2 of 3 (b) Construct a $95 \%$ confidence interval for the proportion of people who performed volunteer work during the past year. Round the answer to at least three decimal places.
A $95 \%$ confidence interval for the proportion of people who performed volunteer work during the past year is $\square$ $<p<$ $\square$ Skip Part Check Save For Later Submit Assignmen 2024 McGraw Hill LLC. All Rights Reserved. Terms of Use I Privacy Center I Accessibil

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Problem 2306

ww-awu-aleks.com its Bexting and Onlin. Sports Betting Secrot -... 11/22/24 ATL C CHI /// St. Homo - Northern Essex. Content A ALEKs - Jonathen Vcga. ChatGPT (5) XaiCenat - Twitch Homework $\& 4: 7(1,2,3,4) 8(2,3,4)$ Question 34 of 40 (1 point) 1 Question Attempt: 1 of 3 Jonathan
Volunteering: The General Social Survey asked 1305 people whether they performed any volunteer work during the past year. A total of 522 people said they Español did.
Part 1 of 3 (a) Find a point estimate for the proportion of people who performed volunteer work during the past year. Round the answer to at least three decimal places.
The point estimate for the proportion of people who performed volunteer work during the past year is 0.4000 .
Alternate Answer: 0.4
Part 2 of 3 (b) Construct a $95 \%$ confidence interval for the proportion of people who performed volunteer work during the past year. Round the answer to at least three decimal places.
A $95 \%$ confidence interval for the proportion of people who performed volunteer work during the past year is $0.3737<p<0.4263$ .
Part: $2 / 3$
Part 3 of 3 (c) A sociologist states that $46 \%$ of Americans perform volunteer work in a given year. Does the confidence interval contradict this statement? Explain.
The confidence interval (Choose one) $\square$ contradict the claim, because 0.46 (Choose one) $\square$ contained in the confidence interval. Skip Part Check Save For Later Submit Assignment - 2024 McGraw Hill LLC. All Rights Reserved. Terms of Use I Privacy Center I Accessibitity

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Problem 2307

www-awu.aleks.com and Onlin. Sports Betting Secret - 11/22/24 ATL @ CHI III St... Home - Northern Essex... Content A Aleks - Jonathan Voga... ChatGPT (5) KaiCenat - Twitch Homework * 4: $7(1,2,3,4) 8(2,3,4)$ Question 35 of 40 (1 point) 1 Question Attempt: 1 of 3 Jonathan 2 23 24 25 26 27 28 29 30 31 32 Español 33
Contaminated water: In a sample of 44 water specimens taken from a construction site, 27 contained detectable levels of lead.
Part 1 of 3 (a) Construct a $95 \%$ confidence interval for the proportion of water specimens that contain detectable levels of lead. Round the answer to at least three decimal places.
A $95 \%$ confidence interval for the proportion of water specimens that contain detectable levels of lead is $0.471<p<0.757$ .
Part: $1 / 3$
Part 2 of 3 (b) Construct an $80 \%$ confidence interval for the proportion of water specimens that contain detectable levels of lead. Round the answer to at least three decimal places.
An $80 \%$ confidence interval for the proportion of water specimens that contain detectable levels of lead is $\square$ $<p<$ $\square$ . Skip Part Check Save For Later Submit Assignment - 2024 McGraw Hill LLC. All Rights Reserved. Terms of Use T Privacy Center I Accessibility

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Problem 2308

ww-awu-aleks.com letting and Onlin Sports Betting Secret -m. 1122/24 ATL @CHI III St... Home - Northern Essex... Contont A) ALeks - Jonathan Voga.. ChatGPT (5) KaiConat - Twitch Homework * 4: $7(1,2,3,4) 8(2,3,4)$ Question 36 of 40 (1 point) I Question Attempt: 1 of 3 Jonathan 2 23 24 25 26 27 28 29 30 31 $\checkmark 2$ Español 133
Changing jobs: A sociologist sampled 214 people who work in computer-related jobs, and found that 44 of them have changed jobs in the past 6 months. Part: $0 / 2$ $\square$
Part 1 of 2 (a) Construct a $99.8 \%$ confidence interval for those who work in computer-related jobs who have changed jobs in the past 6 months. Round the answer to at least three decimal places.
A $99.8 \%$ confidence interval for the proportion of those who work in computer-related jobs who have chaneed jobs in the past 6 months is $0.2056^{\boldsymbol{\alpha}}<p<0.0843$ .

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Problem 2309

www-awu.aleks.com Sports Betting Secret -... 11/22/24 ATL @ CHI /// St... Home - Northern Essex... Content ChatGPT (5) KaiCenat - Twitch Homework \# 4: 7(1,2,3,4) 8(2,3,4) Question 36 of 40 (1 point) I Question Attempt: 1 of 3 2 23 24 25 26 27 28 29 30 Español Jonathan
Changing jobs: A sociologist sampled 214 people who work in computer-related jobs, and found that 44 of them have changed jobs in the past 6 months. Part 1 of 2 (a) Construct a $99.8 \%$ confidence interval for those who work in computer-related jobs who have changed jobs in the past 6 months. Round the answer to at least three decimal places.
A $99.8 \%$ confidence interval for the proportion of those who work in computer-related jobs who have changed jobs in the past 6 months is 0.1203 $\square$
Part: $1 / 2$
Part 2 of 2 (b) Among the 214 people, 128 of them are under the age of 35 . These constitute a simple random sample of workers under the age of 35. If this sample were used to construct a $99.8 \%$ confidence interval for the proportion of workers under the age of 35 who have changed jobs in the past 6 months, is it likely that the margin of error would be larger, smaller, or about the same as the one in Part (a)?
The margin of error would be (Choose one) $\square$ , because the size of the sample is $\square$ (Choose one) . Skip Part Check Save For Later Submit Assignment

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Problem 2310

www-awu.aleks.com Ig and Onlin... Sports Betting Secret -... 11/22/24 ATL @ CHI /// St... Home - Northern Essex... Content ALEKS - Jonathan Vega... ChatGPT
Homework \# 4: $7(1,2,3,4) 8(2,3,4)$ Question 39 of 40 (1 point) | Question Attempt: 1 of 3 29 30 $\checkmark 31$ 33 34 35 36 37 38
IQ scores: Scores on an IQ test are normally distributed. A sample of 8 IQ scores had standard deviation $s=6$ . (a) Construct a $95 \%$ confidence interval for the population standard deviation $\sigma$ . Round the answers to at least two decimal places. (b) The developer of the test claims that the population standard deviation is $\sigma=7$ . Does this confidence interval contradict this claim? Explain.
Part: $0 / 2$
Part 1 of 2
A $95 \%$ confidence interval for the population standard deviation is $3.97<\sigma<10.79$ .

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Problem 2311

www-awu.aleks.com tting and Onlin.... Sports Betting Secret - 11/22/24 ATL @ CHI III St... Home - Northern Essex... Content ChatGPT (5) KaiCenat - Twitcr Homework \# 4: $7(1,2,3,4) 8(2,3,4)$ Question 40 of 40 (1 point) I Question Attempt: 1 of 3 Jonathan Español
Eat your cereal: Boxes of cereal are labeled as containing 16 ounces. Following are the weights of a sample of 12 boxes. Assume the population is normally distributed. \begin{tabular}{llllll} \hline 16.05 & 15.96 & 16.13 & 16.07 & 16.17 & 16.07 \\ 16.03 & 16.17 & 16.16 & 15.96 & 16.18 & 16.18 \\ \hline \end{tabular} Send data to Excel
Part 1 of 3 (a) Find the sample standard deviation. Round the answer to at least four decimal places.
The sample standard deviation $s$ is 0.0452 .
Correct Answer: $0.0826$
Part: $1 / 3$
Part 2 of 3 (b) Construct a $99 \%$ confidence interval for the population standard deviation $\sigma$ . Round the answers to at least two decimal places.
A $99 \%$ confidence interval for the population standard deviation is $\square$ $<\sigma<$ $\square$ . Skip Part Check Save For Later Submit Assign

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Problem 2312

Onlin. Sports Betting Secret - 11/22/24 ATL @ CHI I// St... Home - Northern Essex... Content ChatGPT (5) KaiCenat - Twitch Homework : $4: 7(1,2,3,4) 8(2,3,4)$ Question 16 of 40 (1 point) I Question Attempt: 1 of 3 Jonathan $\checkmark 14$ 15 $=16$ $=18$ 19 20 22 23 24 Español 25>
SAT scores: Assume that in a given year the mean mathematics SAT score was 522, and the standard deviation was 116 . A sample of 66 scores is chosen. Use the TI-84 Plus calculator.
Part 1 of 5 (a) What is the probability that the sample mean score is less than 509? Round the answer to at least four decimal places.
The probability that the sample mean score is less than 509 is $0.1841{ }^{\text {® }}$ .
Correct Answer:
The probability that the sample mean score is less than 509 is 0.1813 .
Part: $1 / 5$
Part 2 of 5 (b) What is the probability that the sample mean score is between 486 and 525? Round the answer to at least four decimal places.
The probability that the sample mean score is between 486 and 525 is $\square$ Skip Part Check Save For Later Submit Assignment (c) 2024 McGraw Hill LLC. All Rights Reserved.Terms of Use I Privacy Center I Accessibility

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Problem 2313

www-awu-aleks.com Sports Beting Secret -... 11/22/24 ATL @ CHI /// St... Homo - Northern Essex... Content A Aleks - Jonathan Vcga... ChatGPT (5) Kalcenat - Twitch Homework \# 4: $7(1,2,3,4) 8(2,3,4)$ Question 16 of 40 (1 point) I Question Attempt: 1 of 3 Jonathan
SAT scores: Assume that in a given year the mean mathematics SAT score was 522, and the standard deviation was 116. A sample of 66 scores is chosen. Use the TI-84 Plus calculator. Español
Part 1 of 5 (a) What is the probability that the sample mean score is less than 509? Round the answer to at least four decimal places.
The probability that the sample mean score is less than 509 is $0.1841^{8}$ .
Correct Answer:
The probability that the sample mean score is less than 509 is 0.1813 .
Part 2 of 5 (b) What is the probability that the sample mean score is between 486 and 525? Round the answer to at least four decimal places.
The probability that the sample mean score is between 486 and 525 is 0.5773
Part: $2 / 5$
Part 3 of 5 (c) Find the $90^{\text {th }}$ percentile of the sample mean. Round the answer to at least two decimal places.
The $90^{\text {th }}$ percentile of the samplemean is $\square$ . part Check Save For Later Submit Assignment @ 2024 MeGraw Hill LLC. All Rights Reserved. Terms of Use I Privacy Center I Accessibility

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Problem 2314

The electric cooperative needs to know the mean household usage of electricity by its non-commercial customers in kWh per day. Assume that the population standard deviation is 2.5 kWh . The mean electricity usage per family was found to be 17.7 kWh per day for a sample of 443 families. Construct the $80 \%$ confidence interval for the mean usage of electricity. Round your answers to one decimal place.

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Problem 2315

Question 2
Less than 39\% of workers got their job through newspaper ads. Express the null and alternative hypotheses in symbolic form for this claim (enter as a percentage). $\begin{array}{l} H_{0}: p \square \\ H_{1}: p \square \end{array}$
Use the following codes to enter the following symbols: $\begin{array}{l} \geq \text { enter }>= \\ \leq \text { enter }<= \\ \neq \text { enter }!= \end{array}$

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Problem 2316

Find how many times as much the cost of each share of stock in these companies was in 2010 compared to the cost of each share in 1960. \begin{tabular}{|l|c|c|} \hline Company & 1960 Cost & 2010 Cost \\ \hline Company A & $\$ 0.55$ & $\$ 7.15$ \\ \hline Company B & $\$ 0.25$ & $\$ 3.90$ \\ \hline Company C & $\$ 0.45$ & $\$ 3.78$ \\ \hline \end{tabular}
The cost of each share of stock in Company A was $\square$ times as much in 2010. (Type in integer or a decimal)

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Problem 2317

ww-awu-aleks.com Sports Boting and Onlin... Sports Boting Secret -.. 11/22/24 ATL @ CHI $/ 1 / \mathrm{St}$ . Home - Northern Essex Content ALEKs - Jonathan Vega. ChatGPT (5) KaiCenat - 1 Homework $4: 7(1,2,3,4) 8(2,3,4)$ Question 16 of 40 (1 point) I Question Attempt 1 of 3 Jonathan
The probability that the sample mean score is less than 509 is 0.1841 0 Españ
Correct Answer:
The probability that the sample mean score is less than 509 is 0.1813 .
Part 2 of 5 (b) What is the probability that the sample mean score is between 486 and 525? Round the answer to at least four decimal places.
The probability that the sample mean score is between 486 and 525 is 0.5773
Part 3 of 5 (c) Find the $90^{\text {th }}$ percentile of the sample mean. Round the answer to at least two decimal places.
The $90^{\text {th }}$ percentile of the sample mean is 540.25 .
Part: $3 / 5$
Part 4 of 5 (d) Using a cutoff of 0.05 , would it be unusual if the sample mean were greater than 525 ? Round the answer to at least four decimal places.
It $\square$ (Choose one) be unusual if the sample mean were greater than 525 , since the probability is $\square$ . Skip Part Check Save For Later Submit Assignment (a) 2024 McGraw Hill LLC. All Rights Reserved. Terms of Use I Privagy Center I Accessilbility

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Problem 2318

www-awu.aleks.com ig and Onlin. Sports Betting Secret -- 11/22/24 ATL @ CHI I// St... Home - Northern Essex... Content ChatGPT (5) KaiCenat - Twitc Homework 4 4:7(1,2,3,4) 8(2,3,4) Question 17 of 40 (1 point) I Question Attempt: 1 of 3 Jonathan $\checkmark 14$ 15 16 - 1. $=18$ 19 20 $\checkmark 21$ 22 $\checkmark 23$ Espariol 25
Taxes: The Internal Revenue Service reports that the mean federal income tax paid in the year 2010 was $\$ 8040$ . Assume that-the standard deviation is $\$ 4500$ . The IRS plans to draw a sample of 1000 tax returns to study the effect of a new tax law.
Part 1 of 5 (a) What is the probability that the sample mean tax is less than $\$ 7900$ ? Round the answer to at least four decimal places.
The probability that the sample mean tax is less than $\$ 7900$ is 0.1628
Part: $1 / 5$
Part 2 of 5 (b) What is the probability that the sample mean tax is between $\$ 7400$ and $\$ 8100$ ? Round the answer to at least four decimal places.
The probability that the sample mean tax is between $\$ 7400$ and $\$ 8100$ is $0.9986^{\$}$ . Skip Part Check Save For Later Submit Assignment 2024 McGraw Hill LLC. All Rights Reserved. Terms of Use I Privacy Center 1 Accessibity

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Problem 2319

ww-awu-alcks.com Sports Betting and Onlin. Sports Boting Secret - $11122 / 24$ ATL @ CHI/// St... Home - Northern Essex ${ }_{w t}$ Content A aleks - Jonathan Vogam. ChatGPT (5) Kaic Homework 4 4: $7(1,2,3,4) 8(2,3,4)$ Question 17 of 40 (1 point) I Question Attempt 1 of 3 Jonatha
Taxes: The Internal Revenue Service reports that the mean federal income tax paid in the year 2010 was $\$ 8040$ . Assume that the standard deviation is $\$ 4500$ . The IRS plans to draw a sample of 1000 tax returns to study the effect of a new tax law.
Part 1 of 5 (a) What is the probability that the sample mean tax is less than $\$ 7900$ ? Round the answer to at least four decimal places.
The probability that the sample mean tax is less than $\$ 7900$ is 0.1628 .
Part 2 of 5 (b) What is the probability that the sample mean tax is between $\$ 7400$ and $\$ 8100$ ? Round the answer to at least four decimal places.
The probability that the sample mean tax is between $\$ 7400$ and $\$ 8100$ is 0.6628 . Correct Answer:
The probability that the sample mean tax is between $\$ 7400$ and $\$ 8100$ is 0.6634 .
Part: $2 / 5$
Part 3 of 5 (c) Find the $80^{\text {th }}$ percentile of the sample mean. Round the answer to at least two decimal places.
The $80^{\text {th }}$ percentile of the sample mean is $\$$ $\square$ Skip Part Check Save For Later Submit Assignment - 2024 MeGraw Hill LLC. All Rights Reserved. Terms of Use 1 Privagy Center I Accessibility

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Problem 2320

The $p$ -value for a hypothesis test turns out to be 0.051785. At a 7\% level of significance, what is the proper decision? Fail to reject $H_{0}$ Reject $H_{0}$

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Problem 2321

Sports Beting and Onlin... Sports Betting Secret - www-awu.aleks.com Homework \& 4: $7(2,2,3,4) 8(2,3,4)$ Home - Northern Essex Content A Aleks - Jonathan Vcga... ChatGPT (5) Kaicenat - Twitch Question 18 of 40 (1 point) I Question Altempt: 1 of 3 Jonathan 14 15 16 17 $=18$ 19 20 $\checkmark 21$ 22 23 24 Español 25>
Below, $n$ is the sample size, $p$ is the population proportion and $\hat{p}$ is the sample proportion. Use the Central Limit Theorem and the TI-84 Plus calculator to find the probability. Round the answers to at least four decimal places. $\begin{array}{l} n=200 \\ p=0.10 \end{array}$ $P(\hat{p}<0.07)=0.785^{\otimes}$ Check Save For Later Submit Assignment - 2024 McGraw Hill LLC. All Rights Reserved. Terms of Use I Privacy Center I Accessibility

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Problem 2322

The American Heart Association is about to conduct an anti-smoking campaign and wants to know the fraction of Americans over 40 who smoke. Step 2 of 2: Suppose a sample of 1548 Americans over 40 is drawn. Of these people, 1100 don't smoke. Using the data, construct the $99 \%$ confidence interval for the population proportion of Americans over 40 who smoke. Round your answers to three decimal places.

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Problem 2323

10:4/PM Fri Nov 22
You wish to test the following claim ( $H_{a}$ ) at a significance level of $\alpha=0.01$ . $\begin{array}{l} H_{o}: \mu=83.5 \\ H_{a}: \mu \neq 83.5 \end{array}$
You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size $n=556$ with mean $\bar{x}=85.4$ and a standard deviation of $s=16.7$ .
What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = $\square$
What is the $p$ -value for this sample? (Report answer accurate to four decimal places.) p -value = $\square$ The $p$ -value is... less than (or equal to) $\alpha$ greater than $\alpha$
This test statistic leads to a decision to... reject the null accept the null fail to reject the null
As such, the final conclusion is that... There is sufficient evidence to warrant rejection of the claim that the population mean is not equal to 83.5 . There is not sufficient evidence to warrant rejection of the claim that the population mean is not equal to 83.5 . The sample data support the claim that the population mean is not equal to 83.5. There is not sufficient sample evidence to support the claim that the population mean is not equal to 83.5 . Check Answer

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Problem 2324

Complete the following table: \begin{tabular}{|c|c|} \hline Formula & Name \\ \hline & aluminum ion \\ \hline $\square$ & fluoride ion \\ \hline & copper(II) ion \\ \hline \end{tabular}

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Problem 2325

Probability WORKSHEET 7.3
5. In a class of 50 students, 18 take Chorus, 26 take Band, and 2 take both Chorus and Band. How many students in the class are not enrolled in either Chorus or Band?
6. In a school of $\mathbf{3 0 0}$ students, 90 students are in the band, 185 students are on sports teams, and 60 students participate in both activities. How many students are involved in either band or sports?
7. A veterinarian surveys 26 of his patrons. He discovers that 14 have dogs, 10 have cats, and 5 have fish. Four have dogs and cats, 3 have dogs and fish, and one has a cat and fish. If no one has all three kinds of pets, how many patrons have none of these pets?
8. From a survey of 100 college students, a marketing research company found that 75 students owned stereos, 45 owned cars, and 35 owned cars and stereos. a) How many students owned either a car or a stereo? $\qquad$ b) How many students did not own either a car or a stereo? $\qquad$

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Problem 2326

Cash flows from (used for) operating activities-indirect method The net income reported on the income statement for the current year was $\$ 150,900$ . Depreciation recorded on store equipment for the year amounted to $\$ 24,900$ . Balances of the current asset and current liability accounts at the beginning and end of the year are as follows: \begin{tabular}{l|cc} & End of Year & Beginning of Year \\ \hline Cash & $\$ 57,490$ & $\$ 52,890$ \\ Accounts receivable (net) & 41,220 & 39,090 \\ Inventories & 56,280 & 59,500 \\ Prepaid expenses & 6,320 & 5,020 \\ Accounts payable (merchandise creditors) & 53,870 & 50,030 \\ Wages payable & 29,430 & 32,690 \end{tabular} a. Prepare the "Cash flows from (used for) operating activities" section of the statement of cash flows, using the indirect method. Use the minus sign to indicate cash outflows, cash payments, decreases in cash, or any negative adjustments.

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Problem 2327

An analysis of the general ledger accounts indicates that office equipment, which cost $\$ 280,000$ and on which accumulated depreciation totaled $\$ 153,900$ on the date of sale, was sold for $\$ 108,200$ during the year.
Using this information, indicate the items to be reported on the statement of cash flows.
Transactions $\$ 280,000$ cost of office equipment \ $153,900 accumulated depreciation$ \ $108,200$ sales price $\$ 17,900$ loss on sale of equipment (assume the indirect method is used)
Section of Statement of Cash Flows $\square$ $\square$ $\square$ $\square$
Added or Deducted $\square$ $\square$ $\qquad$ $\qquad$

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Problem 2328

iven in the table are the BMI statistics for random samples of men and women. Assume that the two samples are independent simple random samples selected from normally istributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a 0.05 significance level for both parts. Submit t InIS test: 20 point(S) possible This question: 4 point(s) possible \begin{tabular}{|c|c|r|} \hline & Male BMI & Femal \\ \hline $\boldsymbol{\mu}$ & $\mu_{1}$ & $\mu_{2}$ \\ \hline $\bar{n}$ & 49 & 49 \\ \hline $\bar{x}$ & 27.8756 & 26.07 \\ \hline s & 8.866451 & 4.1461 \\ \hline \end{tabular} - Test the claim that males and females have the same mean body mass index (BMI).
That are the null and alternative hypotheses? A $\begin{array}{l} H_{0}: \mu_{1}=\mu_{2} \\ H_{1}: \mu_{1} \neq \mu_{2} \end{array}$ B. $H_{0}: \mu_{1} \neq \mu_{2}$ $H_{1}: \mu_{1}<\mu_{2}$ C $\begin{array}{l} H_{0}: \mu_{1}=\mu_{2} \\ H_{1}: \mu_{1}>\mu_{2} \end{array}$ D. $H_{0}: \mu_{1} \geq \mu_{2}$ $H_{1}: \mu_{1}<\mu_{2}$ he test statistic, t , is $\square$ . (Round to two decimal places as needed.) he $P$ -value is $\square$ (Round to three decimal places as needed.) tate the conclusion for the test. A. Reject the null hypothesis. There is not sufficient evidence to warrant rejection of the claim that men and women have the same mean BMI. B. Fail to reject the null hypothesis. There is not sufficient evidence to warrant rejection of the claim that men and women have the same mean BMI. C. Fail to reject the null hypothesis. There is sufficient evidence to warrant rejection of the claim that men and women have the same mean BMI. Next

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Problem 2329

Buscer los estados finencieros de une emprese en donde usted debe desarrollar lo siguiente:
Describir la estructura y el desempeño financieros y realizar el análisis vertical y horizontal
UQUIDEZ ACTIVO CORRIENTE $=\$ 131.993,02 \$ 11,46$ PASIVO CORRIENTE \11.522,56$ Significa que por cada dólar que la empresa adeuda a corto plazo, dispone de \$11,46 para pagar dicha deuda.
PRUEBA ACIDA ACTIVO CORRIENTE INVENTARIOS $=\$ 131.993,02-\$ 98.400,00=\$ 2,91$ PASIVO CORRIENTE \ $11.522,56 Significa que por cada dólar que la empresa adeuda, disponemos de \$2,91 para pagar dicha deuda; los inventarios se excluyen de este indicador; por considerar activos menos liquidos y los más sujetos a pérdidas LIQUIDEZ INMEDIATA ACTIVO DISPONIBLE$ =\ $26.637,20 \$ 2,31$ PASIVO CORRIENTE S 11.522,56

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Problem 2330

Student/PlayerTest.aspx?canvas_workflow_statesavailable\&canvas_enrollment_state=active\&canvas_user_id=3490178canvas_module_id=9590348canvas_assignment_points kriscia mejia Question 1 of 5 This test: 20 point(s) possible This question: 4 point(s) possible Submit test ven in the table are the BMI statistics for random samples of men and women. Assume that the two samples are independent simple random samples selected from normally tributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a 0.05 significance level for both parts. c. $H_{0}: \mu_{1}=\mu_{2}$ \begin{tabular}{|c|c|c|} \hline & Male BMI & Female BMI \\ \hline $\boldsymbol{\mu}$ & $\mu_{1}$ & $\mu_{2}$ \\ \hline $\boldsymbol{n}$ & 49 & 49 \\ \hline $\bar{x}$ & 27.8756 & 26.0709 \\ \hline $s$ & 8.866451 & 4.146108 \\ \hline \end{tabular} $H_{1}: \mu_{1}>\mu_{2}$ D. $H_{0}: \mu_{1} \gtrless \mu_{2}$ $H_{1}: \mu_{1}<\mu_{2}$ est statistic, $t_{\text {t }}$ is 1.29 . (Round to two decimal places as needed.) -value is 0.202 . (Round to three decimal places as needed.) the conclusion for the test.
Reject the null hypothesis. There is not sufficient evidence to warrant rejection of the claim that men and women have the same mean BMI. Fail to reject the null hypothesis. There is not sufficient evidence to warrant rejection of the claim that men and women have the same mean BMI. eject the null hypothesis. There is sufficient evidence to warrant reje tejection of the claim that men and women have the same mean BMI. of the claim that men and women have the salme mean BMI. $-\mu_{2}<\Pi$

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Problem 2331

of 8 VVS: 30-2 A5 21/22 Sem
Each year, a baseball team sells boxes of chocolates as a fundraiser to lower the cost of team fees. The price of the chocolates and the number of boxes sold varies each year. The information from five years of sales is given in the table below. \begin{tabular}{|c|c|c|c|c|c|} \hline \begin{tabular}{c} Price per \\ box (\) \end{tabular} & 3.00 & 4.00 & 5.50 & 6.50 & 8.00 \\ \hline \begin{tabular}{c} Boxes \\ sold \end{tabular} & 5837 & 3571 & 1950 & 1409 & 1118 \\ \hline \end{tabular} a. Find the regression equation in the form y=a x^{3}+b x^{2}+c x+d $that best approximates the data. Express the values of$ a, b, c $, and$ d $to the nearest hundredth. (1 mark) b. Use the equation to find the number of boxes, to the nearest whole number, that the team will sell if they charge$ \ $4.35$ per box. ( 1 mark) c. One year, the team only sold 366 boxes of chocolates. What price did they charge for each box? (1 mark) d. If the team raises the price too high, they will not sell any boxes. Use your regression equation to predict the lowest price of a box that will result in zero boxes sold. (1 mark)

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Problem 2332

57 Replies, 57. Unread
Discussion: Hypothesis Testing: One Sample Instruction: Post your response first and then reply to two of your colleagues' posts. - Explain the difference between the z-test for mean using a P-Value and the z-test for mean using the rejection region(s).

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Problem 2333

Explain the conditions that are necessary to use the $t$ -test to test the difference between two population means.

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Problem 2334

Use the following information to answer questions 37 and 38 Owl Ltd. sells many products. Hoot is one of its popular items. Below is an analysis of the inventory purchases and sales of Hoot for the month of March. Owl uses the perpetual inventory system and the FIFO costing method. \begin{tabular}{|c|c|c|c|c|c|c|} \hline \multicolumn{2}{|l|}{\multirow[b]{3}{}{Price/Unit}} & \multirow[t]{2}{}{} & \multicolumn{2}{|r|}{Purchases} & \multicolumn{2}{|r|}{Sales} \\ \hline & & & Units & Unit Cost & Units & Selling \\ \hline & & & & & & \\ \hline Mar & 1 & Beginning inventory & 600 & \40 & & \\ \hline & 3 & Purchase & 100 & 60 & & \\ \hline & 4 & Sales & & t & 190 & \$80 \\ \hline & 10 & Purchase & 100 & 66 & & \\ \hline & 16 & Sales & & & 275 & 120 \\ \hline & 19 & Sales & & & 220 & 120 \\ \hline & 25 & Sales & & & 75 & 120 \\ \hline & 30 & Purchase & 460 & 75 & & \\ \hline \end{tabular}
37. What is the Cost of Goods Sold for March? (a) \ $34,734$ (b) $\$ 36,366$ (c) $\$ 33,960$ (d) $\$ 37,140$ (e) None of the above
38. What is the ending inventory at March 31? (a) $\$ 34,734$ (b) $\$ 36,366$ (c) $\$ 33,960$ (d) $\$ 37,140$ (e) None of the above

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Problem 2335

The stem-and-leaf plot shows the number of guesses for the number of marbles in a jar. Use the stem-and-leaf plot for questions 1-3. Guesses for Number of Marbles in a Jar \begin{tabular}{c|llllll} \hline Stem & \multicolumn{6}{|c}{ Leaves } \\ \hline 6 & 5 & 5 & 6 & 8 & 9 & 9 \\ 7 & 2 & 3 & 3 & 8 & 8 & 9 \\ 8 & 3 & 5 & & & & \\ 9 & 1 & 2 & 3 & 6 \\ & & & \\ & & 6 & 5 represents 65 \end{tabular}
1. (1 point) Half the guesses is less than what number? a. 73 b. 73.5 c. 75.5 d. 78
2. (1 point) How many guesses for the number of marbles in the jar? a. 22 b. 18 c. 14 d. 31
3. (1 point) Two more guesses were added to the data set, their values were 63 and 68 . Which statement about the data is true? a. The range stays the same. b. The range increases by two. c. The range decreases. d. The range doubles.

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Problem 2336

Using the following information:
1. The bank statement balance is $\$ 4,690$ .
2. The cash account balance is $\$ 5,080$ .
3. Outstanding checks amounted to $\$ 715$ .
4. Deposits in transit are $\$ 1,020$ .
5. The bank service charge is $\$ 40$ .
6. A check for $\$ 72$ for supplies was recorded as $\$ 27$ in the ledger.
Prepare a bank reconciliation for Miller Co. for August 31. Miller Co. Bank Reconcillation August 31 Cash balance according to bank statement $\$$ $\square$ $\checkmark$ $\square$ $\square$ $\square$
Adjusted balance $\square$ Cash balance according to company's records $\square$ $\square$ $\qquad$ $\$$ $\square$ \\square\square $Adjusted balance \$$ \square$

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Problem 2337

Table 2 \begin{tabular}{|c|c|} \hline Base & $\mathbf{K}$ \\ \hline Ammonia, $\mathrm{NH}_{3}$ & $1.8 \times 10^{-5}$ \\ \hline Hydrazine, $\mathrm{N}_{2} \mathrm{H}_{4}$ & $1.2 \times 10^{-6}$ \\ \hline Pyridine, $\mathrm{C}_{5} \mathrm{H}_{5} \mathrm{~N}$ & $1.6 \times 10^{-9}$ \\ \hline Aniline, $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}$ & $7.4 \times 10^{-10}$ \\ \hline \end{tabular} i. Choose the most basic solution.

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Problem 2338

\begin{tabular}{|c|c|c|c|c|c|} \hline \multirow[t]{2}{}{1A} & \multirow[b]{2}{}{H} & \multirow[b]{3}{}{5A} & \multirow[b]{3}{}{6 A} & \multirow[b]{3}{}{7A} & \multirow[t]{3}{}{\begin{tabular}{l} 8A \\ 2 \\ He \end{tabular}} \\ \hline & & & & & \\ \hline 3 A & 4A & & & & \\ \hline 5 & 6 & 7 & 8 & 9 & 10 \\ \hline B & C & N & 0 & F & Ne \\ \hline 13 & 14 & 15 & 16 & 17 & 18 \\ \hline Al & Si & P & S & Cl & Ar \\ \hline 31 & 32 & 33 & 34 & 35 & 36 \\ \hline Ga & Ge & As & Se & Br & Kr \\ \hline 49 & 50 & 51 & 52 & 53 & 54 \\ \hline In & Sn & Sb & Te & I & Xe \\ \hline \end{tabular}
Lewis dot structures are helpful in understanding properties of molecules and ions such as shape, reactivity, and how they interact with other chemical species such as biomolecules in the body. Here we explore the steps needed to draw a Lewis structure.
Create the Lewis structure of $\mathrm{CF}_{4}$ . NOTE: do only the step asked for in each part and then click Check-don't work ahead to solve the final structure.
Step 1. Count valence electrons in the molecule or ion. Do this by adding the periodic group numbers for each atom in the structure and adjusting for charge. Enter and Check.

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Problem 2339

The stem-and-leat plot shows the number of guesses for the number of marbles in a jar. Use the stem-and-leaf plot for questions 1-3.
Guesses for Number of Marbles in a Jar \begin{tabular}{c|llllll} \hline Stem & \multicolumn{6}{|c}{ Leaves } \\ \hline 6 & 5 & 5 & 6 & 8 & 9 & 9 \\ 7 & 2 & 3 & 3 & 8 & 8 & 9 \\ 8 & 3 & 5 & & & & \\ 9 & 1 & 2 & 3 & 6 & & \\ & & 615 & represents 65 \end{tabular}
1. (1 point) Half the guesses is less than what number? a. 73 b. 73.5 c. 75.5 d. 78
2. (1 point) How many guesses for the number of marbles in the jar? a. 22 b. 18 c. 14 d. 31
3. (1 point) Two more guesses were added to the data set, their values were 63 and 68. Which statement about the data is true? a. The range stays the same. b. The range increases by two. c. The range decreases. d. The range doubles.

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Problem 2340

Using the following data answer questions 6 \& 7 : \begin{tabular}{|c|l|} \hline Value & Frequency \\ \hline 1 & $X$ \\ \hline 2 & $X X$ \\ \hline 3 & $X X X$ \\ \hline 4 & $X X X X$ \\ \hline 5 & $X X X X X$ \\ \hline 6 & $X$ \\ \hline \end{tabular} histogram A
HISTOGRAM B
HISTOGRAM C histogRam D
6. (1 point) Which histogram represents the data?
7. (1 point) What is the skewness of the data? a. Left skew b. Right skew c. Bimodal d. Symmetric
8. (1 point) The standard deviation of $-5,-5,-5,-5,-5$ is $\qquad$ a. -5 b. 5 c. 0 d. -25
9. (1 point) The mean of 11 numbers is 7 . One of the numbers, 13 , is deleted. What is the mean of the remaining 10 numbers? a. 7.7 b. 6.4 c. 6.0

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Problem 2341

Question 17, 7.1.18 Part 1 of 2 HW Score: 65.65\%, 15.1 of 23 poir Points: 0 of 1
A genetic experiment with peas resulted in one sample of offspring that consisted of 433 green peas and 163 yellow peas. a. Construct a $95 \%$ confidence interval to estimate of the percentage of yellow peas. b. Based on the confidence interval, do the results of the experiment appear to contradict the expectation that $25 \%$ of the offispring peas would be yellow? a. Construct a 95\% confidence interval. Express the percentages in decimal form. $\square$ $<p<$ $\square$ (Round to three decimal places as needed.)

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Problem 2342

108. Harrison Bank has the following financial information. \begin{tabular}{|c|c|} \hline ROE & $16 \%$ \\ \hline Net Income & $\$ 1000$ \\ \hline Total Assets & $\$ 62,500$ \\ \hline Total Equity & $\$ 6250$ \\ \hline \end{tabular}
What is this bank's asset utilization ratio? A) $1.6 \%$ B) $10 \%$ C) $12.8 \%$ D) $16 \%$

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Problem 2343

108. Harrison Bank has the following financial information. \begin{tabular}{|c|c|} \hline ROE & $16 \%$ \\ \hline Net Income & $\$ 1000$ \\ \hline Total Assets & $\$ 62,500$ \\ \hline Total Equity & $\$ 6250$ \\ \hline \end{tabular}
What is this bank's asset utilization ratio? A) $1.6 \%$ B) $10 \%$ C) $12.8 \%$ D) $16 \%$

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Problem 2344

Use the 2020 Federal Tax Rates for Individuals to calculate the estimated taxes for a taxable income of $\$ 66,900$ . \begin{tabular}{|c|c|} \hline \multicolumn{2}{|c|}{2020 Federal Tax Rates for Individuals } \\ \hline Tax rate & Taxable Income Bracket \\ \hline $10 \%$ & $\$ 0$ to $\$ 9875$ \\ \hline $12 \%$ & $\$ 9876$ to $\$ 40,125$ \\ \hline $22 \%$ & $\$ 40,126$ to $\$ 85,525$ \\ \hline $24 \%$ & $\$ 85,526$ to $\$ 163,300$ \\ \hline $32 \%$ & $\$ 163,301$ to $\$ 207,350$ \\ \hline $35 \%$ & $\$ 207,351$ to $\$ 518,400$ \\ \hline $37 \%$ & $\$ 518,401$ or more \\ \hline \end{tabular}

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Problem 2345

the 2020 Federal Tax Rates for Individuals to calculate the estimated taxes for a taxable income of $\$ 35,100$ . \begin{tabular}{|c|c|} \hline \multicolumn{2}{|c|}{2020 Federal Tax Rates for Individuals } \\ \hline Tax rate & Taxable Income Bracket \\ \hline $10 \%$ & $\$ 0$ to $\$ 9875$ \\ \hline $12 \%$ & $\$ 9876$ to $\$ 40,125$ \\ \hline $22 \%$ & $\$ 40,126$ to $\$ 85,525$ \\ \hline $24 \%$ & $\$ 85,526$ to $\$ 163,300$ \\ \hline $32 \%$ & $\$ 163,301$ to $\$ 207,350$ \\ \hline $35 \%$ & $\$ 207,351$ to $\$ 518,400$ \\ \hline $37 \%$ & $\$ 518,401$ or more \\ \hline \end{tabular}

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Problem 2346

Assume that you plan to use a significance level of $\alpha=0.05$ to test the claim that $p_{1}=p_{2}$ . Use the given sample sizes and numbers of successes to find the p-value for the hypothesis test. $\begin{array}{l} n_{1}=100, n_{2}=100 \\ x_{1}=38, x_{2}=40 \end{array}$ A. 0.2130 B. 0.0412 C. 0.7718 D. 0.1610

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Problem 2347

4. The scatter plot represents the average yards gained $x$ and the average points scored per game $y$ in one season for ten randomly selected football teams. The equation of the line of best fit for this data is $y=-10.283+0.098 x$ .
Football Team Statistics
Part A Complete the table by writing the unknown residual values. Round to the nearest tenth. \begin{tabular}{c|c|c} \begin{tabular}{c} Average Yards \\ Gained \end{tabular} & \begin{tabular}{c} Average Points \\ Scored \end{tabular} & Residual \\ \hline 247 & 15 & 1.1 \\ \hline 293 & 18 & 0.9 \\ \hline 300 & 20 & -1.5 \\ \hline 345 & 22 & -1.1 \\ \hline 361 & 24 & -0.2 \\ \hline 372 & 26 & \\ \hline \end{tabular}

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Problem 2348

The incomes in a certain large population of college teachers have a Normal distribution, with mean \ $75,000 and standard deviation$ \ $10,000$ . Sixteen teachers are selected at random from this population to serve on a committee. What is the probability that their average salary is more than $\$ 77,500$ ? 0.8413 essentially 0 0.0228 0.1587

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Problem 2349

Following are the marks of 13 students in a small quiz: $2,7,3,6,5,4,8,5,8,6,5,9,3$ then the median of these marks is 6.5 6 5.5 5 None of these

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Problem 2350

Find the probability, $P(M \cap R)$ , associated with the tree diagram.
What is $\mathrm{P}(\mathrm{M} \cap \mathrm{R})$ ? $\square$ (Round to the nearest hundredth.)

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Problem 2351

```latex There are 70 items in a postbox, 36 of which are being sent first class. 28 of the items are neither parcels nor being sent first class.
10 of the items are parcels. An item is chosen at random from the postbox. By first copying and completing the frequency tree below, calculate $P$ (first class and parcel). Give your answer as a fraction in its simplest form. ```

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Problem 2352

Q1(6). Parents were asked if sports are equally important for boys and girls. Suppose that the proportion of parents who agree the equal importance in the population is actually 0.65 . In a survey, of the 400 parents interviewed, $70 \%$ agreed that boys and girls should have equal opportunities to participate in sports.
1(2). Describe the sampling distribution of the sample proportion of parents who agree that boys and girls should have equal opportunities.
2(4). What is the probability of observing a sample proportion as large as or larger than the observed value $\hat{p}$ $=0.70 ?$

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Problem 2353

Stanley makes braided dog collars to sell at his friend's doggy daycare. He always makes 2 neon-colored collars for every 3 primary-colored collars.
Complete the table. \begin{tabular}{|l|c|c|c|c|} \hline 4) $)$ Neon collars & 2 & 8 & $\square$ & $\square$ \\ \hline 0) $)$ Primary collars & 3 & $\square$ & 18 & 21 \\ \hline \end{tabular}
Graph the data from the table.

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Problem 2354

Use the tree diagram below to work out the probability that at least one of the two customers buys a vanilla ice cream. Give your answer as a fraction in its simplest form.

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Problem 2355

The probability that Zeiden scores when taking a penalty is $\frac{1}{4}$ . a) Copy and complete the tree diagram below to show all the possible outcomes of Zeiden taking two penalties. b) What is the probability that he does not score the first penalty but scores the second penalty? Give your answer as a fraction in its simplest form.

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Problem 2356

A group of students sat a biology test and a chemistry test. The frequency tree below shows some information about whether the students passed or failed each test.
A student is chosen at random from the group. What is the probability that they failed at least one test? Give your answer as a fraction in its simplest form.

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Problem 2357

Winnie's Wings offers a rewards card. With every $\$ 50$ spent, customers can choose 2 free appetizers.
Complete the table. \begin{tabular}{|l|c|c|c|c|} \hline 1)) Amount spent (\) & 50 & \mid & & 250 \\ \hline 1) ) Free appetizers & 2 & 6 & 8 & \square$ \\ \hline \end{tabular}

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Problem 2358

varince
A simple random sample of 31 men from a normally distributed population results in a standard deviation of 10.7 beats per minute. The normal range of pulse rates of adults is typically given as 60 to 100 beats per minute. If the range rule of thumb is applied to that normal range, the result is a standard deviation of 10 beats per minute. Use the sample results with a 0.10 significance level to test the claim that pulse rates of men have a standard deviation equal to 10 beats per minute. Complete parts (a) through (d) below. a. Identify the null and alternative hypotheses. Choose the correct answer below. A. $H_{0}: \sigma \neq 10$ beats per minute B. $H_{0}: \sigma=10$ beats per minute $H_{1}: \sigma=10$ beats per minute $H_{1}: \sigma<10$ beats per minute C. $H_{0}: \sigma=10$ beats per minute D. $H_{0}: \sigma \geq 10$ beats per minute $H_{1}: \sigma \neq 10$ beats per minute $H_{1}: \sigma<10$ beats per minute b. Compute the test statistic. $x^{2}=\square$ (Round to three decimal places as needed.)

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Problem 2359

Part 2 of 2
Claim: A majority of adults would erase all of their personal information online if they could. A software firm survey of 528 randomly selected adults showed that $57 \%$ of them would erase all of their personal information online if they could. Complete parts (a) and (b) below. a. Express the original claim in symbolic form. Let the parameter represent the adults that would erase their personal information. p 0.5 (Type an integer or a decimal. Do not round.) b. Identify the null and alternative hypotheses. $\mathrm{H}_{0}$ : $\square$ $\square$ $\square$ $\mathrm{H}_{1}$ : $\square$ $\square$ (Type integers or decimals. Do not round.)

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Problem 2360

Claim: The mean pulse rate (in beats per minute) of adult males is equal to 68.7 bpm . For a random sample of 166 adult males, the mean pulse rate is 68 bpm and the standard deviation is 10.8 bpm . Complete parts (a) and (b) below. a. Express the original claim in symbolic form. $\square$ $\square$ $\square$ bpm (Type an integer or a decimal. Do not round.)

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Problem 2361

Claim: The standard deviation of pulse rates of adult males is more than 11 bpm . For a random sample of 174 adult males, the pulse rates have a standard deviation of 12.4 bpm . Complete parts (a) and (b) below. a. Express the original claim in symbolic form. $\square$ $\square$ $\square$ bpm (Type an integer or a decimal. Do not round.)

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Problem 2362

You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures: \begin{tabular}{|r|} \hline 55 \\ \hline 60.5 \\ \hline 49.4 \\ \hline 46 \\ \hline 55.5 \\ \hline 41.7 \\ \hline 35.6 \\ \hline 75.9 \\ \hline 47.2 \\ \hline 62.3 \\ \hline \end{tabular}
Find the $99 \%$ confidence interval. Enter your answer as an open-interval (i.e., parentheses) accurate to two decimal places (because the sample data are reported accurate to one decimal place).
99\% C.I. = $\square$ Answer should be obtained without any preliminary rounding.

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Problem 2363

You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures: \begin{tabular}{|r|} \hline 17.5 \\ \hline 12.7 \\ \hline 12.7 \\ \hline 2.1 \\ \hline 7.4 \\ \hline 13.1 \\ \hline 39.6 \\ \hline 21.4 \\ \hline 33.9 \\ \hline 3.9 \\ \hline 25.1 \\ \hline 36.7 \\ \hline \end{tabular}
Find the $99 \%$ confidence interval. Enter your answer as an open-interval (i.e., parentheses) accurate to two decimal places (because the sample data are reported accurate to one decimal place).
99\% C.I. =
Answer should be obtained without any preliminary rounding.

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Problem 2364

The gates of 80 students have been recorded showing man of 18 and variance of 16 . Then the proportion of thee grades will tall betweren 8 and 78 is At least 56\% At least 89\% Approximately $18 \%$ Approximately 99.7\% At least 25\% At least 84\%

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Problem 2365

Not yet answered Marked out of 1.00
The grades of 50 students have been recorded showing mean of 12 and variance of 9 . Note that the median mode, and the mean are equal. Then the number of these grades will fall between 3 and 12 is approximatehy 31 17 45 34 25 41

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Problem 2366

In a recent Super Bowl, a TV network predicted that $39 \%$ of the audience would express an interest in seeing one of its forthcoming television shows. The network ran commercials for these shows during the Super Bowl. The day after the Super Bowl, and Advertising Group sampled 144 people who saw the commercials and found that 50 of them said they would watch one of the television shows.
Suppose you are have the following null and alternative hypotheses for a test you are running: $\begin{array}{c} H_{0}: p=0.39 \\ H_{a}: p<0.39 \end{array}$
Calculate the test statistic, rounded to 3 decimal places $z=\square$

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Problem 2367

You are conducting a study to see if the proportion of women over 40 who regularly have mammograms is significantly more than 0.73 . You use a significance level of $\alpha=0.05$ . $\begin{array}{l} H_{0}: p=0.73 \\ H_{1}: p>0.73 \end{array}$
You obtain a sample of size $n=210$ in which there are 167 successes. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic $=$ $\square$ What is the $p$ -value for this sample? (Report answer accurate to four decimal places.) p -value = $\square$

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Problem 2368

jas that has a constant emperature and number of particles. Use the data to answer these two questions.
When the volume of the gas is doubled, the pressure of the gas \begin{tabular}{|c|c|c|} \hline & $(\mathrm{L})$ & $(\mathrm{mm} \mathrm{Hg})$ \\ \hline 1 & 6.00 & 1600 \\ \hline 2 & 8.00 & 1200 \\ \hline 3 & 12.0 & 800 \\ \hline 4 & 16.0 & 600 \\ \hline 5 & 24.0 & 400 \\ \hline \end{tabular} becomes $\qquad$ .
Tap to select answer.
Which set of trials demonstrate this relationship? Select all that apply. Rows 1 and 2 Rows 2 and 4 Rows 1 and 3 Rows 2 and 5 Rows 1 and 4 Rows 3 and 4 Rows 1 and 5 Rows 3 and 5

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Problem 2369

Two types of medicines are being tested in their effectiveness at reducing migraines. Two random samples of 200 patients were each given either Medicine A or Medicine B. In the group given Medicine A, 23 reported no headache after 30 minutes and in the group given Medicine B, 50 reported no headache after 30 minutes.
Complete the setup for a hypothesis test at $1 \%$ level of signficance to determine if there is a difference in the proportion of relieved headaches. You may use the Compare Two Population Proportions tool.
Identify the null and alternative hypothesis. The null hypothesis is $H_{0}: p_{A}>p_{B}$ $H_{0}: p_{A}<p_{B}$ $H_{0}: p_{A}=p_{B}$ $H_{0}: p_{A} \neq p_{B}$ The alternative hypothesis is $H_{A}: p_{A}>p_{B}$ $H_{A}: p_{A}<p_{B}$ $H_{A}: p_{A}=p_{B}$ $H_{A}: p_{A} \neq p_{B}$
Round your answers to three decimal places.
The pooled proportion is $p_{c}=$ $\square$ , the standard error is $\mathrm{SE}=$ $\square$ and the test statistic is $z=$ $\square$ We will use a Select an answer test.

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Problem 2370

Using data from a nation's census, an economist produced the following Lorenz curves for the distribution of that nation's income in 1962 and 1972. $\begin{array}{ll} f(x)=\frac{1}{2} x+\frac{1}{2} x^{2} & \text { Lorenz curve for } 1962 \\ g(x)=\frac{2}{5} x+\frac{3}{5} x^{2} & \text { Lorenz curve for } 1972 \end{array}$
Find the Gini index of income concentration for each Lorenz curve and interpret the results.
Identify the integrand for the computation of the Gini index for 1962 and 1972.
The Gini index for 1962 is given by $2 \int_{0}^{1}\left(\square d^{2} x\right.$ and the Gini index for 1972 is given by $2 \int_{0}^{1} \square d x$ .

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Problem 2371

Here are the hottest recorded temperatures (in ${ }^{\circ} \mathrm{F}$ ) for each of sixteen cities throughout North America. \begin{tabular}{|c|c|c|c|c|c|c|c|} \hline \multicolumn{7}{|c|}{ Temperatures } \\ $\left(\right.$ in $\left.^{\circ} \mathrm{F}\right)$ \end{tabular}
Send data to calculator (a) Complete the grouped frequency distribution for the data. (Note that the class width is 4. ) \begin{tabular}{|cc|} \hline \begin{tabular}{c} Temperatures \\ (in ${ }^{\circ} \mathrm{F}$ ) \end{tabular} & \begin{tabular}{c} Frequency \end{tabular} \\ \hline 92.5 to 96.5 & $\square$ \\ 96.5 to 100.5 & $\square$ \\ 100.5 to 104.5 & $\square$ \\ 104.5 to 108.5 & $\square$ \\ 108.5 to 112.5 & $\square$ \\ \hline \end{tabular} (b) Using the classes from part (a), draw the frequency polygon for the data. Note that you can add or remove classes from the figure. Label each class with its midpoint.

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Problem 2372

Points: 0 of 1 Save
The prices of 9 houses sold in a neighborhood are shown. Complete parts (a) through (e) below. \begin{tabular}{ll} $\$ 199,000$ & $\$ 210,000$ \\ $\$ 171,000$ & $\$ 185,000$ \\ $\$ 220,000$ & $\$ 188,000$ \\ $\$ 17,000$ & $\$ 190,000$ \\ $\$ 485,000$ & \end{tabular} A. The mode of the data set is $\$$ $\square$ (Type an integer or a decimal. Use a comma to separate answers as needed.) B. There is no mode. d) Determine the midrange.
The midrange of the data set is $\$ 328,000$ . (Type an integer or a decimal.) e) Which measure of central tendency, the mean or the median, best represents the typical price of the houses sold?
The best measure of central tendency that represents the typical price of the houses sold is the mean $\square$ because the mean is not affected by unusual data values.

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Problem 2373

For 2022, XYZ company had the following information: Net Sales \ $100,000 Operating expenses \$20,000 Invenntory on 1/1/2022 \$40,000 Inventory on 31/12/2022 \$50,000 Freight in$ \ $100$ Purchases \ $200,000 Purchase discount \$10,000 Purchase return and allowances$ \ $2000$ Prepare Income Statement for XYZ company for 2022, CYZ company uses periodic system

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Problem 2374

The salaries of 10 employees of a small company are listed. Complete parts (a) through ( t ) below. \begin{tabular}{cc} \hline $\$ 27000$ & $\$ 68000$ \\ \hline 26000 & 31000 \\ \hline 28000 & 30000 \\ \hline 29000 & 79000 \\ \hline 29000 & 32000 \\ \hline \end{tabular} b) Determine the median.
The median salary is \ $29500 (Simplify your answer.) c) Determine the mode(s). Select the correct choice below and, if necessary, fill in the answer box within your choice. A. The mode salary/salaries is/are$ \ $29000$ . (Use a comma to separate answers, but do not use commas in any individual numbers.) B. There is no mode. d) Determine the midrange.
The midrange of the data set is $\$$ $\square$ (Simplify your answer.)

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Problem 2375

2. For each scenario, state whether the correlation is likely positive, negative, or no correlation. a. Hours studying and the price you will pay for Star Buck's on the day of an exam. b. Life expectancy and the number of years of being a smoker. c. Speed of travel and duration to one's destination.

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Problem 2376

Question Fill in the following contingency table and find the number of students who both play sports AND play an instrument. \begin{tabular}{|l|l|l|l|} \hline Students & play an instrument & do not play an instrument & Total \\ \hline play sports & & & 51 \\ \hline do not play sports & 23 & & 48 \\ \hline Total & & 46 & \\ \hline \end{tabular}
Provide your answer below:

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Problem 2377

ANOVA Aaxiety Leve! \begin{tabular}{ll|l|l|l|l} & \begin{tabular}{l} Sum of \\ Squares \end{tabular} & df & & Mean Square & $F$ \end{tabular} - Interpret these results by explaining if there is a significant difference between any of the groups, and if so, how you can tell. - Reflect on these results and how they fit with your own experiences and expectations. - Discuss any limitations of ANOVA and explain how they relate to this situation.

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Problem 2378

isiah cromer Homework: Homework 10 Question 3, 13.2.4 Part 3 of 4 HW Score: $5.56 \%, 1.17$ of 21 points Points: 0 of 3 Save
Question list x/, Question 1 */s Question 2 Question 3 Question 4 Question 5 Question 6 Question 7
The production of wine is a multibilion-dollar worldwide industry, In an attempt to develop a model of wine quality as judged by wine experts, data was collected from red wine variants of a certain type of wine. A sample of 12 wines is given. Develop a simple linear regression model to predict wine quality, measured on a scale from 0 (very bad) to 10 (excellent), based on alcohol content (\%) Complete parts (a) through (d) below 囲 Click the icon to view the data of wine quality and alcohol content. a. Construct a scatter plot Choose the correct graph below. b. For these data, $b_{0}=50$ and $b_{1}=0.2$ Interpret the meaning of the slope, $b_{1}$ , in this problem Choose the correct answer below A. The slope, $b_{1}$ , implies that for each increase of alcohol percentage of 10 , the wine quality rating is expected to increase by the value of $b_{1}$
O B. The slope, $\mathrm{b}_{1}$ , implies that for each 0.2 percentage decrease in alcohol content, the wine should have an increase in its rating by 1 . $O C$ . The slope, $\mathrm{b}_{1}$ , implies that the alcohol content is equal to the value of $b_{1}$ , in percentages. O. The slope, $b_{1}$ , implies that for each increase of 1 wine quality rating, the alcohol content is expected to increase by the value of $b_{1}$ , in percentages. c. Predict the mean wine quality for wines with an $12 \%$ alcohol content (Round to two decimal places as needed) solve this View an example Get more help - Clear all Check answer

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Problem 2379

16. La tasa de inflación anual se define como la variación porcentual del Índice de Precios al Consumidor (IPC) de un mes respecto al mismo mes del año anterior.
En cierto pais, en abril de 2021 el IPC fue de 110 y en abril de 2022 fue de 121 , ¿cuál fue la tasa de inflación anual en el periodo descrito? A) $11 \%$ B) $10 \%$ C) $9 \%$ D) $2,1 \%$

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Problem 2380

\begin{tabular}{|c|c|c|c|c|} \hline \multicolumn{5}{|c|}{ Test scores } \\ \hline 97 & 80 & 94 & 86 & 85 \\ \hline 96 & 80 & 83 & 84 & 95 \\ \hline 98 & 93 & 94 & 81 & 82 \\ \hline \end{tabular}
Send data to calculator (a) Complete the grouped frequency distribution for the data. (Note that the class width is 5.) \begin{tabular}{|cc|} \hline Test scores & Frequency \\ \hline 78.5 to 83.5 & 5 \\ 83.5 to 88.5 & 3 \\ 88.5 to 93.5 & 1 \\ 93.5 to 98.5 & 6 \\ \hline \end{tabular} (b) Using the classes from part (a), draw the frequency polygon for the data. Note that you can add or remove classes from the figure. Label each class with its midpoint.

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Problem 2381

Huntington-Hill method
The fire department of a certain city is adding 65 firefighters to its force. The fire chief needs to allocate the firefighters to five districts, according to their populations. The populations of the districts are shown in the table below. Use the Huntington-Hill method to allocate the firefighters to the districts. You may use the apportionment tool to help you. To do this, turn ON the apportionment tool, enter a divisor, and click on "Compute". You will then see the quota, the lower quota, the rounded quota (to the nearest whole number), the upper quota, and the geometric mean of the lower quota and upper quota for each district. You may also click on active cells to fill in the bottom row.
Apportionment Tool: OFF) \begin{tabular}{|c|c|c|c|c|c|c|} \hline District & Natal & Draco & Salto & York & Tabriz & Total \\ \hline Population & 65,380 & 130,695 & 94,890 & 43,440 & 47,145 & 381,550 \\ \hline \begin{tabular}{c} Number of \\ firefighters \end{tabular} & $\square$ & $\square$ & $\square$ & $\square$ & $\square$ & 0 \\ \hline \end{tabular}

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Problem 2382

A positive (+) correlation is when $\qquad$ A negative (-) correlation is when $\qquad$ $X$ decreases, Y increases; $X$ decreases, Y decreases. $X$ decreases, $Y$ increases; $X$ increases, $Y$ decreases. $X$ increases, $Y$ increases; $X$ decreases, $Y$ decreases. $X$ decreases, Y decreases: Xincreases, Y decreases.

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Problem 2383

Which of the following coefficients indicates the most consistent or strongest relationship? - 56 1.08 55

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Problem 2384

Use Regression to Find and Use an Exponential Model to answer the questions: The numbers of polio cases in the world are shown in the table for various years. \begin{tabular}{|c|c|} \hline Year & Number of Polio Cases (thousands) \\ \hline 1988 & 350 \\ \hline 1992 & 138 \\ \hline 1996 & 33 \\ \hline 2000 & 5 \\ \hline 2005 & 3.2 \\ \hline 2007 & 1.3 \\ \hline \end{tabular}
Let $f(t)$ be the number of polio cases in the world $t$ years since 1980 . The exponential regression equation for the data above is: $f(t)=3768.57(0.74)^{t}$
Predict the number of polio cases in 2011. $\square$ Hint
Predict in which year there will be 1 case of polio. $\square$ Find the approximate half-life of the number of polio cases. Round your answer to one decimal place. $\square$ years Question Help: Post to forum

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Problem 2385

Use the theoretical probability formula to solve the problem. Express the probability as a fraction reduced to lowest terms.
Use the spinner below to answer the question. Assume that it is equally probable that the pointer will land on any one of the five numbered spaces. If the pointer lands on a borderline, spin again. Find the probability that the arrow will land on 2 or 3. A) 2 B) 1 C) $\frac{2}{5}$ D) $\frac{3}{2}$

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Problem 2386

From $10^{\circ} \mathrm{C}, 25^{\circ} \mathrm{C}, 50^{\circ} \mathrm{C}$ , and $60^{\circ} \mathrm{C}$ , select the best estimate of the Celsius temperature of a warm winter day in New Jersey. The average temperature in New Jersey during the winter is about $30^{\circ} \mathrm{F}$
Choose the temperature that best represents a warm winter day in New Jersey. $60^{\circ} \mathrm{C}$ $50^{\circ} \mathrm{C}$ $25^{\circ} \mathrm{C}$ $10^{\circ} \mathrm{C}$

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Problem 2387

Find the volume of 75 grams of a substance given its density.

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Problem 2388

Find the standard deviation of human pregnancy lengths given a mean of 267 days and $95\%$ lasting between 245 and 289 days. What percent last at least 285 days? Standard deviation: $\square$ days.

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Problem 2389

Find the cutoff score for an $A$ if the mean is 74 and the standard deviation is 8.11, top $6\%$ .

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Problem 2390

Find the mean of a normal distribution where 1 SD above is 93 and 2 SD below is 39.

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Problem 2391

In 1973, a Mets ticket was \$1.30. What would it cost in 2019 using the CPI of 44.4 and 255.657? Round to the nearest cent.

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Problem 2392

Find the standard deviation of human pregnancy lengths given a mean of 267 days and a range of 245 to 289 days. What percent last at least 285 days?

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Problem 2393

What would the minimum wage in 2015 be if it grew with inflation from \$1.25 in 1965? Round to the nearest cent.

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Problem 2394

Colorado has 62,885 births yearly for a population of $5,845,526$ . How many births for 100,000 people? Round to nearest whole number.

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Problem 2395

In 1992, what would a house priced at \$29,000 in 1972 be, given the CPI was 41.8 in 1972 and 140.3 in 1992? Round to the nearest dollar.

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Problem 2396

Calculate the coefficient of variation for four production alternatives with returns and standard deviations. Recommend the best option to minimize risk.

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Problem 2397

Greengage, Inc. is evaluating four projects. Determine the least risky by range, lowest standard deviation, and calculate the coefficient of variation for each project. Which project should they choose?

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Problem 2398

Swift Manufacturing evaluates two projects. Find the return range, expected return, standard deviation, and coefficient of variation for each project. Also, create bar charts for the returns and determine which project is less risky.

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Problem 2399

Calculate the third moment of the numbers $2, 3, 4, 5, 6$ .

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Problem 2400

Calculate the average exam grades for 10 students who studied ( $93, 96, 89, 88, 88, 99, 78, 96, 98, 75$ ) and 10 who didn't ( $64, 72, 70, 63, 56, 49, 88, 66, 76, 76$ ). Provide answers to two significant figures.

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Data & Statistics

Problem 2301

Problem 2302

Problem 2303

Problem 2304

Problem 2305

Problem 2306

Problem 2307

Problem 2308

Problem 2309

Problem 2310

Problem 2311

Problem 2312

Problem 2313

Problem 2314

Problem 2315

Problem 2316

Problem 2317

Problem 2318

Problem 2319

Problem 2320

The ppp-value for a hypothesis test turns out to be 0.051785. At a 7\% level of significance, what is the proper decision? Fail to reject H0H_{0}H0​ Reject H0H_{0}H0​

Problem 2321

Problem 2322

Problem 2323

Problem 2324

Complete the following table: \begin{tabular}{|c|c|} \hline Formula & Name \\ \hline & aluminum ion \\ \hline□\square□ & fluoride ion \\ \hline & copper(II) ion \\ \hline \end{tabular}

Problem 2325

Problem 2326

Problem 2327

Problem 2328

Problem 2329

Problem 2330

Problem 2331

Problem 2332

57 Replies, 57. UnreadDiscussion: Hypothesis Testing: One Sample Instruction: Post your response first and then reply to two of your colleagues' posts. - Explain the difference between the z-test for mean using a P-Value and the z-test for mean using the rejection region(s).

Problem 2333

Explain the conditions that are necessary to use the ttt-test to test the difference between two population means.

Problem 2334

Problem 2335

Problem 2336

Problem 2337

Problem 2338

Problem 2339

Problem 2340

Problem 2341

Problem 2342

Problem 2343

Problem 2344

Problem 2345

Problem 2346

Problem 2347

Problem 2348

Problem 2349

Following are the marks of 13 students in a small quiz: 2,7,3,6,5,4,8,5,8,6,5,9,32,7,3,6,5,4,8,5,8,6,5,9,32,7,3,6,5,4,8,5,8,6,5,9,3 then the median of these marks is 6.5 6 5.5 5 None of these

Problem 2350

Find the probability, P(M∩R)P(M \cap R)P(M∩R), associated with the tree diagram.What is P(M∩R)\mathrm{P}(\mathrm{M} \cap \mathrm{R})P(M∩R) ? □\square□ (Round to the nearest hundredth.)

Problem 2351

Problem 2352

Problem 2353

Problem 2354

Use the tree diagram below to work out the probability that at least one of the two customers buys a vanilla ice cream. Give your answer as a fraction in its simplest form.

Problem 2355

Problem 2356

Problem 2357

Winnie's Wings offers a rewards card. With every $50\$ 50$50 spent, customers can choose 2 free appetizers.Complete the table. \begin{tabular}{|l|c|c|c|c|} \hline 1)) Amount spent (\) & 50 & \mid & & 250 \\ \hline 1) ) Free appetizers & 2 & 6 & 8 & \square$ \\ \hline \end{tabular}

Problem 2358

Problem 2359

Problem 2360

Problem 2361

Problem 2362

Problem 2363

Problem 2364

The gates of 80 students have been recorded showing man of 18 and variance of 16 . Then the proportion of thee grades will tall betweren 8 and 78 is At least 56\% At least 89\% Approximately 18%18 \%18% Approximately 99.7\% At least 25\% At least 84\%

Problem 2365

Not yet answered Marked out of 1.00The grades of 50 students have been recorded showing mean of 12 and variance of 9 . Note that the median mode, and the mean are equal. Then the number of these grades will fall between 3 and 12 is approximatehy 31 17 45 34 25 41

Problem 2366

Problem 2367

Problem 2368

Problem 2369

The $p$ -value for a hypothesis test turns out to be 0.051785. At a 7\% level of significance, what is the proper decision? Fail to reject $H_{0}$ Reject $H_{0}$

Complete the following table: \begin{tabular}{|c|c|} \hline Formula & Name \\ \hline & aluminum ion \\ \hline $\square$ & fluoride ion \\ \hline & copper(II) ion \\ \hline \end{tabular}

57 Replies, 57. Unread
Discussion: Hypothesis Testing: One Sample Instruction: Post your response first and then reply to two of your colleagues' posts. - Explain the difference between the z-test for mean using a P-Value and the z-test for mean using the rejection region(s).

Explain the conditions that are necessary to use the $t$ -test to test the difference between two population means.

Following are the marks of 13 students in a small quiz: $2,7,3,6,5,4,8,5,8,6,5,9,3$ then the median of these marks is 6.5 6 5.5 5 None of these

Find the probability, $P(M \cap R)$ , associated with the tree diagram.
What is $\mathrm{P}(\mathrm{M} \cap \mathrm{R})$ ? $\square$ (Round to the nearest hundredth.)

Winnie's Wings offers a rewards card. With every $\$ 50$ spent, customers can choose 2 free appetizers.
Complete the table. \begin{tabular}{|l|c|c|c|c|} \hline 1)) Amount spent (\) & 50 & \mid & & 250 \\ \hline 1) ) Free appetizers & 2 & 6 & 8 & \square$ \\ \hline \end{tabular}

The gates of 80 students have been recorded showing man of 18 and variance of 16 . Then the proportion of thee grades will tall betweren 8 and 78 is At least 56\% At least 89\% Approximately $18 \%$ Approximately 99.7\% At least 25\% At least 84\%

Not yet answered Marked out of 1.00
The grades of 50 students have been recorded showing mean of 12 and variance of 9 . Note that the median mode, and the mean are equal. Then the number of these grades will fall between 3 and 12 is approximatehy 31 17 45 34 25 41