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9 May, 07:29

The heights of the children at a summer camp are normally distributed with a mean of 58 in. and a standard deviation of 4 in.

There are 150 children at the summer camp.

About how many children are expected to have heights between 54 in. and 62 in.?

51

71

102

143

+4
Answers (1)
  1. 9 May, 10:18
    0
    First, we must find the z-scores for each limit

    for 54

    z = (54 - 58) / 4 = - 1

    For this z-score, the area under the curve is 0.1587

    for 62

    z = (62 - 58) / 4 = 1

    The area under the curve is 0.8413

    Subtracting the two z-scores:

    0.8413 - 0.1587 = 0.6825

    Multiplying by 150

    150 (0.6825) = 102.39

    So, the closest answer is

    102
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