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StatsChiCDF

StatsChiCDF (x, n)​

The StatsChiCDF function returns the chi-squared cumulative distribution function for the specified value and degrees of freedom n

F(x;n)=γ(n2,x2)Γ(n2).F(x ; n)=\frac{\displaystyle \gamma\left(\frac{n}{2}, \frac{x}{2}\right)}{\displaystyle \Gamma\left(\frac{n}{2}\right)} .

where is γ (a,b ) the incomplete gamma function. The distribution can also be expressed as

F(x;n)=1−gammq(n2,x2).\displaystyle F(x ; n)=1-{gammq}\left(\frac{n}{2}, \frac{x}{2}\right) .

See Also​

Statistical Analysis, StatsChiPDF, StatsInvChiCDF, gammq