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

- statistics -
**MathGuru**, Monday, May 16, 2011 at 5:24pm
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.

- statistics -
**Sam**, Monday, December 2, 2013 at 8:54pm
Mean=9

Variance=792

Standard Deviation=28.14

## Answer this Question

## Related Questions

- Statistics - A mathematics class has 200 members. If there is 12% absentee rate ...
- Maths - A mathematics class has 200 members. If there is 12% absentee rate per ...
- stats - A club has 50 members. If there is a 10% absentee rate per meeting, find...
- Statistics - 80. Florida State University has 14 statistics classes scheduled ...
- Check answers please Statistics - Suppose that each student in stat. has a 9% ...
- Stats - a teacher teaches two sections (A and B) of a class. Both sections have ...
- Statistics - M/C - 14. The marks on a statistics test are normally distributed ...
- statistics - The mean grade in this class last semester was 78.3, and the ...
- statistics - An instructor in a large lecture class found at the end of the ...
- Statistics - The heights of the students in a statistics class are approximately...