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Hypothesis Test Concerning Means Proportions, abd variance
1. According to the school librarian, tge average number of pages of books in the reference section is 240. To test her claim, she collected a sample of 15 books and after noting the number of pages of each book, she determined that the mean number of pages is 224.6 with a standard deviation of 4.1. At [tex] \alpha = 0.01[/tex] , will the librarian be able to prove her claim ?
2. The standard deviation of the number of minutes of calls of a certain subscriber is 40 minutes per day. A sample of 10 days gave a variance of 38 minutes. Test the hypothesis with [tex] \alpha = 0.05[/tex] that the standard deviation of the call usage is not equal to 40.
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