# 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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