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Suppose the mean height for adult males in the U.S. is about 70 inches and the standard deviation is about 3 inches. Assume men’s heights follow a normal curve.

a) (2 pts) What percentage of adult males are under 64 inches tall? Use the 68-95-99.7 and draw a picture that illustrates your rationale.

b) (2 pts) What percentage of adult males are between 64 and 73 inches tall? Use the 68-95-99.7 and draw a picture that illustrates your rationale.

Sagot :

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