求概率论题解答题目如下,求大神 Let X1 and X2 be two independent standard no
求概率论题解答
题目如下,求大神 Let X1 and X2 be two independent standard normal distributed random variables.
Let U be independent of X1 and X2 and is uniformly distributed on (0, 1). Define
Z = UX1 + (1 − U)X2. Find the mean and variance of Z.