According to data collected 06 of facebook users are under 1

According to data collected, 0.6% of facebook users are under 13 (the site is restricted to users 13 and older). In a simple random sample of 500 children under the age of 13, find the mean and standard deviation for number of facebook users.

Solution

binomial distribution

mean = n*p = 500 * 0.006 = 3

standard deviation = srqt(n*p*q) = srqt ( 500 * 0.006 * (1-0.006) ) = 1.7268