Let X denote a random variable for which E[(X-a)^2] exists. Give an example of a distribution o

Question

Madhur L · Accepted Answer

First, we know that $Eleft[(X-a)^{2}right]$ is the variance of $X$ when $a$ is the mean of $X$.

Let $X$ denote a random variable for which $E\left[(X-a)^{2}\right]$ exists. Give an example of a distribution of a discrete type such that this expectation is zero. Such a distribution is called a degenerate distribution.