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The chi-squared distribution arises in statistics If @math{Y_i} are
@math{n} independent gaussian random variates with unit variance then the
sum-of-squares,
has a chi-squared distribution with @math{n} degrees of freedom.
- Random: double gsl_ran_chisq (const gsl_rng * r, double nu)
-
This function returns a random variate from the chi-squared distribution
with nu degrees of freedom. The distribution function is,
for @c{$x \ge 0$}
@math{x >= 0}.
- Function: double gsl_ran_chisq_pdf (double x, double nu)
-
This function computes the probability density @math{p(x)} at x
for a chi-squared distribution with nu degrees of freedom, using
the formula given above.
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