Given a Random Variable X that has a binomial distribution with n = 60 and p = 0.5 find...

Question

Find P(X  60)  =      


Find E(X)  or the mean of X 


Find Var(X) 

Answer 1

P(X=60) = 0.5⁶⁰ = 8.67 x 10^-19 ~ 0

 

mean of X = n*p = 60*0.5 = 30  

 

Var(X) = n*p*(1-p) = 60*0.5*0.5 = 15