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1. Mensa is an organization of people who have high IQs. To be eligible for membership, a person must have an IQ "higher than 98 percent of the population." What IQ is required to qualify?

2. The mean height of American women aged 20-29 is 64.2 inches, with a standard deviation of 2.5 inches (Statistical Abstract of the United States: 2009, 2008).

a. What height divides the tallest 5 percent of the population from the rest?

b. The minimum height required for women to join the U.S. Army is 58 inches. What proportion of the population is excluded?

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