Central moment

Computes the $k$-th central moment of a data sample

$m_k=\frac{1}{n}\sum _{i=1}^n{\left(x_i-\overline{x}\right)}^k$

where $\overline{x}$ is the mean of our sample and $n$ is the size of the data.

central_moment(Integer, Statistics_data)

Description

Given an integer $k$ and a data sample $X$, computes the $k$-th central moment of $X$.