LOTUS, Variance

Class: STAT 131 Subject: probability Date: 2025-02-11 Teacher: **Prof. Marcela

LOTUS

• if $x$ is a discrete random variable and $g$ is a function from $\mathbb{R}$ to\mathbb{R}$, then $E(g(X))={\sum }_{x}P(X=x)$
• where the sum is taken over all possible values of $X$.