MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

Learn moreOpportunities for recent engineering grads.

Apply Today
Asked by Mohamed Ahkim on 16 Sep 2013

Linear combinations of chi square variables have already been implemented in Matlab, so I thought it should be also the case for the independent ratio.

More precisely, I want to compute the quantiles of the ratio of $X$, which is a chi square variable with $r_1$ degrees of freedom and independent from $Y$, and $Y$, which is a linear combination of independent central chi square variables.

Kind regards, Mohamed

*No products are associated with this question.*

## 1 Comment

Direct link to this comment:http://www.mathworks.com/matlabcentral/answers/87317#comment_169575

When you write that linear combinations of chi-square variables are implemented, what do you have in mind?

The ratio of two independent chi-squares has an F distribution (or a multiple of one). I don't know the distribution if the denominator is a linear combination of chi-squares.