Suppose that X and Y are random variables and that X and Y are nonnegative for all points in a sample space S.Let Z be the random variable defined by Z(s)=max(X(s),Y(s)) for all elements s∈S.show that E(Z)≤E(X)+E(Y)[br][br]-=-=-=-=- 以下内容由 gina411 在 时添加 -=-=-=-=-
大家集思广益,谢谢啦!