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Statistics - Minimal Sample Size Required

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Managers at an automobile manufacturing plant would like to estimate the mean completion time for an assembly line. Assuming the standard deviation is 10.1 minutes, what is the minimal sample size for managers to be 99% confident that their estimate is within 2.2 minutes.

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Solution Summary

This solution contains step-by-step calculations to determine the minimum sample size, sample size and z score for 99% confidence.

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