It has been reported that 83% of federal government employees use email. If a sample of 200 federal government employees is selected, find the mean, variance, and standard deviation of the number who use email.
statistics - MathGuru, Tuesday, October 5, 2010 at 8:52pm
mean = np
variance = npq
standard deviation = square root of the variance
n = 200
p = .83
q = 1 - p
I'll let you take it from here.