The Normal Distribution

AP Statistics· difficulty 4/5

Adult male heights are approximately N(70 in, 3 in).

Heights N(70, 3) 70 76

Approximately what percent of men are taller than 76 inches?

  • A

    5%

  • B

    16%

  • C

    0.15%

  • D

    2.5%

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Explanation

76 = 70 + 2(3). About 95% lie within 2 SDs, leaving 5% in tails — 2.5% in the upper tail.

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