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posted by Michelle on Monday, May 16, 2011 at 5:20pm.

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

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.

Mean=9 Variance=792 Standard Deviation=28.14

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