Test of a Single Variance · Exercise 22
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 Business Statistics 2e · §11.2 Test of a Single Variance · Exercise 22
No hints for this one.
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