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# scipy.special.chdtr

`scipy.special.``chdtr`(v, x) = <ufunc 'chdtr'>

  Chi square cumulative distribution function

  Returns the area under the left hand tail (from 0 to x) of the Chi square probability density function with v degrees of freedom:

      1/(2**(v/2) * gamma(v/2)) * integral(t**(v/2-1) * exp(-t/2), t=0..x)