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Law of Total Variance
Law of Total Variance
Dec 10, 2025
1 min read
math/probability
Definition
Var
[
E
(
X
∣
Y
)]
≤
Var
(
X
)
=
Var
[
E
(
X
∣
Y
)]
+
E
[
Var
(
X
∣
Y
)]
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