Moments of a Distribution

Moments are quantitative measures of a distribution function. Formally, the nth moment about a value c of a distribution f(x) is defined as

$$\begin{array}{l}{\mu }_n=E[(x-c{)}^n]=\\ \left\{\begin{array}{c}{\displaystyle \sum {(x-c)}^{n}f(x)\text{Discrete distibution}}\\ {\displaystyle \int {(x-c)}^{n}f(x)}dx\text{Continuous distribution}\end{array}\right\}.\end{array}$$

[Page 1084]When c = 0, they are called the raw moments, and when c is set at the mean of the ...