It has been reported that 86% of federal government employees use email. If a sample of 175 federal government employees is selected, find the mean, varience, and standard deviation of the number who use email.

Answer 1

mean = np
variance = npq
Note: q = 1 - p

standard deviation = square root of the variance

I'll get you started and let you finish the calculations:

mean = 175 * .86 = ?
variance = 175 * .86 * .14 = ?
Note: * means to multiply

I hope this will help.