Test of a Single Variance · Exercise 24
For each word problem, use a solution sheet to solve the hypothesis test problem. Go to for the chi-square solution sheet. Round expected frequency to two decimal places.
Consumers may be interested in whether the cost of a particular calculator varies from store to store. Based on surveying 43 stores, which yielded a sample mean of $84 and a sample standard deviation of $12, test the claim that the standard deviation is greater than $15.
This is an open-ended exercise: its source gives no single answer.
OpenStax, Introductory Statistics 2e · §11.6 Test of a Single Variance · Exercise 24
No hints for this one.
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