PCHISQ(3M)

NAME
pchisq

DESCRIPTION
function pchisq.f source
  Bevington, pages 192-193. purpose
  evaluate probability for exceeding chi square usage
  result = pchisq (chisqr, nfree) description of parameters
  chisqr - comparison value of reduced chi square
  nfree - number of degrees of freedom subroutines and function subprograms required
  gamma (x)
    calculates gamma function for integers and 1/2-integers comments
  calculation is approximate for nfree odd and
    chi square greater than 50