Function Chi-Square-Significance
(
chi-square-significance < x > < dof > )
Computes the complement of the cumulative distribution function for a
Chi-square random variable with `dof' degrees of freedom evaluated at `x.' The
result is the probability that the observed chi-square for a correct model
should be greater than `x.' The implementation follows Numerical Recipes in C,
section 6.2. Small values suggest that the null hypothesis should be rejected;
in other words, this computes the significance of `x.'