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Sample size for mean

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By measuring the amount of time it takes a component of a product to move from one workstation to the next, an engineer has estimated that the standard deviation is 3.92 seconds.

Answer each of the following (show all work):

(A) How many measurements should be made in order to be 90% certain that the maximum error of estimation will not exceed 2.0 seconds?

(B) What sample size is required for a maximum error of 1.5 seconds

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Solution Summary

Step by step method for computing sample size for estimating population mean is given in the answer.

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