← 返回数学题库
355概率困难derivationlong

Beta-Binomial Moments via Adam's and Eve's Laws

题目

Let PBeta(2,3)P \sim \operatorname{Beta}(2, 3) and, given P=pP = p, let XBinomial(10,p)X \sim \operatorname{Binomial}(10, p). Using Adam's law (E[X]=E[E[XP]]E[X] = E[E[X \mid P]]) and Eve's law (Var(X)=E[Var(XP)]+Var(E[XP])\operatorname{Var}(X) = E[\operatorname{Var}(X \mid P)] + \operatorname{Var}(E[X \mid P])), derive E[X]E[X] and Var(X)\operatorname{Var}(X).

解题计时

0:00

提交作答时记录,用于后续平均用时统计。

你的答案

E[X]

Var(X)