Math  /  Data & Statistics

QuestionThe students in a class collected data on the number of minutes some of them spend brushing their teeth every day. That data is shown in the dot plot below.
BRUSHING TEETH
What was the median number of minutes students brushed their teeth?

Studdy Solution

STEP 1

1. The median is defined as the middle value in a list of numbers ordered from smallest to largest.
2. If the list of numbers has an odd number of observations, the median is the middle number.
3. If the list of numbers has an even number of observations, the median is the average of the two middle numbers.

STEP 2

1. List all the data points in ascending order.
2. Determine if the number of data points is odd or even.
3. Identify the median based on the number of data points.

STEP 3

List all the data points in ascending order.
0.5,1,2,2.5,3,3,4 0.5, 1, 2, 2.5, 3, 3, 4

STEP 4

Count the number of data points to determine if it is odd or even.
There are 7 data points.

STEP 5

Since the number of data points (7) is odd, the median is the middle value.
The middle value is the 4th value in the ordered list.

STEP 6

Identify the 4th value in the ordered list.
The 4th value is 2.52.5.
Solution: The median number of minutes students brushed their teeth is 2.52.5 minutes.

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