Question: How many observations should a stopwatch time-study analyst plan for in a task that has a standard deviation of 1.42 minutes per piece if the

How many observations should a stopwatch time-study analyst plan for in a task that has a standard deviation of 1.42 minutes per piece if the goal is to estimate the mean time per piece to within 0.5 minute with a confidence of 95.5 percent? (Round the intermediate calculations to 2 decimal places. Round the final answer to the next whole number.)

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