A time study of a certain service task found an average time of 12.7 minutes and a standard deviation of 1.43, with a standard sample large enough that we are 98% confident that standard time is within 4% of its true value? Was a sample of 25 large enough?

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The Answer of A time study of a certain service task found an average time of 12.7 minutes and a standard deviation of 1.43, with a standard sample large enough that we are 98% confident that standard time is within 4% of its true value? Was a sample of 25 large enough?

A Time Study of a Certain Service Task Found an Average