Chi Squared Distribution

Resources:

• https://en.wikipedia.org/wiki/Chi-squared_distribution

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The PDF of the ${\chi }^2$ distribution is given by

$${\chi }^2(x;k)=\frac{1}{2^{k/2}\Gamma (k/2)}{x}^{(k/2)-1}{e}^{-x/2}$$

Where $\Gamma$ is the Gamma Function