Question: How many observations should a time study analyst plan for in an operation that has a standard deviation of 2 . 9 minutes per plece?

How many observations should a time study analyst plan for in an operation that has a standard deviation of 2.9 minutes per plece?
The goal is to estimate the mean time per plece to within 1.2 minutes, with a confidence of 95.5 percent.
Note: Do not round Intermedate calculatlons. Round up your final answer to the next whole number.
Number of observations
How many observations should a time study analyst plan for in

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