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23 October, 00:59

The heights of american men aged 18 to 24 are approximately normally distributed with a mean of 68 inches and standard deviation of 2.5 inches. Half of all young men are shorter than?

how do I figure this out?

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Answers (2)
  1. 23 October, 01:19
    0
    The given says the height distribution is normally distributed with the mean height equal to 68 inches. In this case, the bell-shaped curve has a vertical symmetry at 68 inches. This means, half of the mean exceeds 68 inches while the other half has height below 68 inches.
  2. 23 October, 03:14
    0
    A normal distribution is symmetrical about the mean. Therefore half of all young men are shorter than 68 inches.
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