試題詳解

Suppose we took a pair of random samples (Xi, X2), with replacement from population f(x): Find E(X) and P(X>1)
(A) E(X)- 1.4, P(X>1)-0.50
(B) E(X) = 1.4, P(X >1)=0.49
(C) E(X)= 1.6, P(X>1)=0.69
(D)E(x)=1.6. P(X>1)=0.71