Heights of males in the United States are approximately normally distributed with a mean of 69.3 inches

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Heights of males in the United States are approximately normally distributed with a mean of 69.3 inches and a standard deviation of 3.0 inches. 

a. What is the probability that a randomly chosen male in the United States has a height greater than 72 inches? 

b. If four males are randomly chosen, what is the probability that their mean height is greater than 72 inches?

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Introduction To Statistical Investigations

ISBN: 9781119683452

2nd Edition

Authors: Beth L.Chance, George W.Cobb, Allan J.Rossman Nathan Tintle, Todd Swanson Soma Roy

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