From d25cb05358bc63124770ab9f88e9b26bfa84dde0 Mon Sep 17 00:00:00 2001 From: Yiyuan Yang Date: Tue, 25 May 2021 10:44:59 +0800 Subject: [PATCH] Update chapter2.md --- docs/chapter2/chapter2.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/chapter2/chapter2.md b/docs/chapter2/chapter2.md index 33f640a..3ef1156 100644 --- a/docs/chapter2/chapter2.md +++ b/docs/chapter2/chapter2.md @@ -162,7 +162,7 @@ $$ > Law of total expectation 也被称为 law of iterated expectations(LIE)。如果 $A_i$ 是样本空间的有限或可数的划分(partition)，则全期望公式可以写成如下形式： > $$ -> \mathrm{E}(X)=\sum_{i} \mathrm{E}\left(X \mid A_{i}\right) \mathrm{P}\left(A_{i}\right) \nonumber +> \mathrm{E}(X)=\sum_{i} \mathrm{E}\left(X \mid A_{i}\right) \mathrm{P}\left(A_{i}\right) > $$ **证明：**