9. The lifetime of a certain electrical part is a random variable with mean 100 hours and

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9. The lifetime of a certain electrical part is a random variable with mean 100 hours and standard deviation 20 hours. If 16 such parts are tested, find the probability that the sample mean is

(a) less than 104;

(b) between 98 and 104 hours.

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Introduction To Probability And Statistics For Engineers And Scientists

ISBN: 9780125980579

3rd Edition

Authors: Sheldon M. Ross

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Question Posted: Sep 11, 2024 09:01 AM

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9. The lifetime of a certain electrical part is a random variable with mean 100 hours and

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Introduction To Probability And Statistics For Engineers And Scientists

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