Question

Find the standard deviation, _, for the binomial distribution which has the stated values of n and p. n=38; p=2/5

Answer 1

Solution: given that

n = 38

p = 2/5 = 0.4 q = 1-p = 1-0.4 = 0.6

standard deviation = sqrt(n*p*q)

sqrt(38*0.4*0.6) = 3.0199