What is the probablility that the sample mean is less than

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The Diameter of a brand of ping pong balls is approximatley normally distributed with the mean of 1.31 inches and the standard deviation of 0.04 inch a random sample of 16 ping pong balls is selected

A) What is the probablility that the sample mean is less than 1.28 inches

B) What is the probablility that the sample mean is between 1.28 and 1.34 inches?

C) The probablility is 56% that the sample mean will be between that two values symmetrically distributed around the population mean?

Reference no: EM13784019

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