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1 November, 14:30

The weights for a population of North American raccoons have a bell-shaped frequency curve with a mean of about 12 pounds and a standard deviation of about 2.5 pounds. About 95% of the weights for individual raccoons in this population fall between what two values?

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  1. 1 November, 14:45
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    Step-by-step explanation:

    Given that the weights for a population of North American raccoons have a bell-shaped frequency curve with a mean of about 12 pounds and a standard deviation of about 2.5 pounds

    Since bell shaped is given we can assume that this follows a normal distribution symmetrical about the mean.

    To find 95% two values we can use Z critical value for 95%

    i. e. ±1.96

    95% will lie between 12±1.96 (2.5)

    = 12±4.9

    = (7.1, 16.9)
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