Refer to Exercise 8. a. Find a 98% lower confidence bound for the mean efficiency. b. The

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Refer to Exercise 8.

a. Find a 98\% lower confidence bound for the mean efficiency.

b. The claim is made that the mean efficiency is greater than $84.6 \%$. With what level of confidence can this statement be made?

Data From Exercise 8:

In a sample of 60 electric motors, the average efficiency (in percent) was 85 . Assume the population standard deviation is 2 .

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Statistics For Engineers And Scientists

ISBN: 9780073107677

6th Edition

Authors: William Navidi

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Question Posted: Feb 04, 2024 05:00 AM

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Refer to Exercise 8. a. Find a 98% lower confidence bound for the mean efficiency. b. The

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Statistics For Engineers And Scientists

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