Mathematics, 19.11.2019 05:31 heyhowdy
The librarian at the local elementary school claims that, on average, the books in the library are more than 20 years old. to test this claim, a student takes a sample of 30 books and records the publication date for each. the sample produces an average age of 23.8 years with a variance of 67.5. what test should you use to determine whether the average age of the library books is significantly greater than 20 years.
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The librarian at the local elementary school claims that, on average, the books in the library are m...
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