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How many observations should a time study analyst plan for in an operation that has a standard deviation of 3 1 minutes per piece The

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How many observations should a time study analyst plan for in an operation that has a standard deviation of 3 1 minutes per piece The goal is to estimate the mean time per piece to within 1 3 minutes with a confidence of 95 5 percent Do not round intermediate calculations Round up your final answer to the next whole number Numbe

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