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

Question

Derrius · Accepted Answer

Variance is supposed to be 7.92

MathGuru · Answer

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.

Sam · Answer

Mean=9 Variance=792 Standard Deviation=28.14

Neydi · Answer

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