Answered: The librarian at the local elementary…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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14. 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 n 30 books and records the publication
date for each. The sample produces an average age of
M 23.8 years with a variance of s
2 67.5. Use this
sample to conduct a one-tailed test with .01 to
determine whether the average age of the library books
is significantly greater than 20 years (μ > 20).

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