Estimate the true actual time-confidence level, Basic Statistics

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Estimate the true actual time-confidence level

Solve the below problem:

Q: 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-confidence level

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