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19 November, 11:49

Suppose a normal distribution has a mean of 79 and a standard deviation of 7. What is P (x< or = to 72) ?

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  1. 19 November, 12:16
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    P (Z < = - 1) = 0.1587

    Step-by-step explanation:

    ok, mean u = 79

    s = 7

    find P (x < = 72)

    P ((x - 79) / 7 < = (72 - 79) / 7) = ?

    P (Z < = - 1) = 0.1587 from Z-scores table
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