The time it takes a mechanic to tune an engine is known to be normally distributed with

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The time it takes a mechanic to tune an engine is known to be normally distributed with a mean of 45 minutes and a standard deviation of 14 minutes.

a. Determine the mean and standard error of a sampling distribution for a sample size of 20 tune-ups. Draw a picture of the sampling distribution.

b. Calculate the largest sampling error you would expect to make in estimating the population mean with the sample size of 20 tune-ups.

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Business Statistics A Decision Making Approach

ISBN: 9780136121015

8th Edition

Authors: David F. Groebner, Patrick W. Shannon, Phillip C. Fry, Kent D. Smith

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Question Posted: Sep 21, 2024 10:03 AM

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The time it takes a mechanic to tune an engine is known to be normally distributed with

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