##

General solution using SPA (`module_A_chisq.m`)

Let element have distribution
, that is the chi-square distribution with
degrees of freedom and scale . A chi-square RV is created whenever
the squares of independent Gaussian RVs of equal variance are
added up. The distribution of the chi-square
RV depends on two parameters, the degrees of freedom ,
which equals the number of Gaussians that were added,
and the variance , which is the assumed variance of the
Gaussians. The mean of equals
.
A description of chi-square random variables is provided in Section 16.1.2.

**Subsections**

Baggenstoss
2017-05-19