probf(x,ndf,ddf,nc) returns the value of the distribution
function of the F distribution with ndf numerator degrees
of freedom, ddf denominator 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=probf(3.57,4,12);
z=probf(3.57,4,12,2);
Copyright © 1997 by Jerry Alan Veeh. All rights reserved.