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7 January, 11:33

state police believe that 70 of the drivers traveling on a major interstate highway what is the mean and standard deviation

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  1. 7 January, 15:26
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    Answer:0.051

    Step-by-step explanation:

    p=70%=0.70

    The standard deviation of the sampling distribution of the sample proportion is the square root of the product of p and q divided by the sample size n:

    =squareroot (pq/n)

    =squareroot (p (1-p) / n)

    =squareroot (0.70 (1-0.70) / 80)

    =0.051
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