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Name: A company that manufactures laptop batteries claims the mean battery l
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Description: A company that manufactures laptop batteries claims the mean battery life is 16 hours. Assuming the distribution of battery life is approximately normal, a consumer group will conduct a hypothesis test to investigate whether the battery life is less

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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A company that manufactures laptop batteries claims the mean battery life is 16 hours. Assuming the distribution of battery life is approximately normal, a consumer group will conduct a hypothesis test to investigate whether the battery life is less than 16 hours. The group selected a random sample of 14 of the batteries and found an average life of 15.6 hours with a standard deviation of 0.8 hour.

Which of the following is the correct test statistic for the hypothesis test?

t=15.6−160.8t=15.6−160.8

A
t=16−15.60.8t=16−15.60.8

B
t=15.6−160.813√t=15.6−160.813

C
t=15.6−160.814√t=15.6−160.814

D
t=16−15.60.814√t=16−15.60.814

E

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