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Problem 1

 

9.11 Hypothesis Test to Compare Two Population Variances: Independent Sampling

Concept
Problem 2
Problem 3
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Is there a difference between the variances of the number of weeks on the best seller lists for nonfiction and fiction books?  Fifteen New York Times bestselling fiction books had a standard deviation of 6.17 weeks on the list.   Sixteen New York Times bestselling nonfiction books had a standard deviation of 13.12 weeks.  At the 10% significance level, can we conclude there is a difference in the variances?

 

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