A manufacturer of electric batteries claims that the average capacity of a certain type ofbattery that the company produces is at least 140 ampere-hours with a standard deviation of 2.66ampere-hours. An independent sample of 20 batteries gave a mean of 138.47 ampere-hours. Test at 5percent significance level the null hypothesis that the mean life is 140 ampere-hours against alternativethat it is lower. Can the manufacturer's claim be sustained on the basis of this sample?

Answered: Image /qna-images/answer/3601a6a9-5968-474a-a854-85bed07c7cd4.jpg

Answered: A manufacturer of electric batteries…

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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