statistics

A history class has 75 members. If there is a 12% absentee rate per class meeting, find the mean, variance, and atandard deviation of the number of students who will be absent from each class

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  1. Mean = np = (75)(.12) = ?

    Variance = npq = (75)(.12)(.88) = ?
    (Note: q = 1 - p)

    Standard deviation = square root of the variance

    I'll let you finish the calculations.

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  2. Mean=9
    Variance=792
    Standard Deviation=28.14

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  3. for the standard deviation, I do not get that answer.

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  4. Variance is supposed to be 7.92

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