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    Sample size determination

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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 3.93 seconds.

    Answer each of the following (show all work):

    (A) How many measurements should be made in order to be 99% certain that the maximum error of estimation will not exceed 0.5 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 is given in the answer.