Question: How many observations should a time study analyst plan for in an operation that has a standard deviation of 17 minutes per piece? The goal

How many observations should a time study analyst plan for in an operation that has a standard deviation of 17 minutes per piece? The goal is to estimate the mean time per piece to within 0.5 minutes, with a confidence of 95,5 percent (Do not round intermediate calculations. Round up your final answer to the next whole number.) Answer is complete but not entirely correct. Number of observations 57

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