Estimate the true actual time-studied for several cycles, Basic Statistics

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Estimate the true actual time-studied for several cycles

Assignment:

A job has been time-studied for several cycles, and the mean actual time was found to be 1.84 minutes. The standard deviation of the actual times were estimated to be 0.38 minute. How many observations should be taken to estimate the true actual time within 10 percent with a 95 percent confidence level?

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Basic Statistics: Estimate the true actual time-studied for several cycles

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