Refer to Exercise 7. a. Find a (90 %) upper confidence bound for the mean lifetime. b.

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Refer to Exercise 7.

a. Find a $90 \%$ upper confidence bound for the mean lifetime.

b. Someone says that the mean lifetime is less than 1220 hours. With what level of confidence can this statement be made?

Data From Exercise 7:

In a sample of 80 light bulbs, the mean lifetime was 1217 hours. Assume the population standard deviation is 52 hours.

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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 7. a. Find a (90 %) upper confidence bound for the mean lifetime. b.

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Confidence Interval and Hypothesis Testing Well analyze the light bulb data from Exercise 7 to find the confidence bound and test the hypothesis about ...View the full answer

Statistics For Engineers And Scientists

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