Question

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

Answer 1

if we can use binomial probability then:

mean = np
sd = sqrt(npq)
and v = npq

Answer 2

n = 200
p = .83
q = (1-p) = .17

Answer 3

mean = 166
var = 28.22
sd = 5.3122....

Answer 4

thank but how did u get that