Important Probability Distributions Discrete Probability Distributions Binomial Distribution 。Variance of B(n,p): - np ∑yg-1)p(1-p)m-10-y y=0 E(X2) =∑a2fx() m-1 x=0 +np∑g-1p(1-p)m-)-y y=0 ∑x2()p(1-p)m- n-1 x=0 npE(Y)+np∑fr(g) ∑x·x)p产(1-p)m- y=0 np(n-1)p+np x=1 np[(m-1)p+1: ∑emg=p'(1-pjm-4 x= m-1 n(y+1)(g-1)p+1(1-p)m-1)-y 2=0 To be Continued Important Probability Distributions Introduction to Statistics and Econometrics June25,2019 16/135Important Probability Distributions Important Probability Distributions Introduction to Statistics and Econometrics June 25, 2019 16/135 Binomial Distribution Discrete Probability Distributions To be Continued