probchi(x,df,nc) returns the value of the distribution
function of the chi-square distribution with df degrees of
freedom and optional non-centrality parameter nc. If not
specified, nc=0. nc is the sum of the squares of the means.
Examples:
y=probchi(3,17);
z=probchi(3,17,5);
Copyright © 1997 by Jerry Alan Veeh. All rights reserved.