posted by Michelle .
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.
for the standard deviation, I do not get that answer.
Variance is supposed to be 7.92