Second moment
= Second moment
{title2=$\mathbb E[X^2]$}
The second <moment> of a real <random variable> is $\mathbb E[X^2]$. Its <variance> is $\mathbb E[X^2]-(\mathbb EX)^2$ when these quantities are finite.
= Second moment
{title2=$\mathbb E[X^2]$}
The second <moment> of a real <random variable> is $\mathbb E[X^2]$. Its <variance> is $\mathbb E[X^2]-(\mathbb EX)^2$ when these quantities are finite.