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Law of Total Variance
$$\operatorname{Var}(X)=E[\operatorname{Var}(X\mid Y)]+\operatorname{Var}(E[X\mid Y])$$
Usage
- Used to decompose total variability into within-group and between-group variation.
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Law of Total Variance
$$\operatorname{Var}(X)=E[\operatorname{Var}(X\mid Y)]+\operatorname{Var}(E[X\mid Y])$$
Usage
- Used to decompose total variability into within-group and between-group variation.
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