QuestionSuppose the weights of seventh-graders at a certain school vary according to a Normal distribution, with a mean of 100 pounds and a standard deviation of 7.5 pounds. A researcher believes the average weight has decreased since the implementation of a new breakfast and lunch program at the school. She finds, in a random sample of 35 students, an average weight of 98 pounds.
What is the -value for an appropriate hypothesis test of the researcher's claim?
0.057
0.115
0.943
Studdy Solution
Compare the -value to a common significance level (e.g., ):
- If -value , reject .
- If -value , do not reject .
Since the -value is 0.057, which is slightly greater than 0.05, we do not reject .
The -value is:
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