Question

Find the​ mean, variance, and standard deviation of the binomial distribution with the given values of n and p. n equals 123n=123​, p equals 0.85

Answer 1

Mean = n.p = (123).(0.4) = 49.2
Variance = np(1-p) = (123)(0.4)(1-0.4) =(123)(0.4)(0.6) = 29.52
Standard. Deviation = √variance = √29.52 = 5.43