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Weights of men are normally distributed with a mean of 189 lb and a standard deviation...

Weights of men are normally distributed with a mean of 189 lb and a standard deviation of 39 lb. If 20 men are randomly selected, find the probability that they have weights with a mean between 200 lb and 230 lb.

Math   Statistics-And-Probability   
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Answer #1

Refer Standard normal table/Z-table to find the probability OR use excel formula "=NORM.S.DIST(4.7015, TRUE)" & "=NORM.S.DIST(1.2614, TRUE)" to find the probability.

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