MATH 376 -- Probability and Statistics II
F-distributions
January 28, 2010
The F-distribution describes the distribution of a
ratio of two - distributed random variables, scaled
by the numbers of degrees of freedom of each: If
is () and is () , then the ratio
has an F-distribution with ``numerator
degrees of freedom'', and ``denominator degrees of
freedom''. F-distributions are always skewed, with
expected value > 1, if
> | read "/home/fac/little/public_html/ProbStat0910/MSP.map"; |
Warning, the use of _seed is deprecated. Please consider using one of the alternatives listed on the _seed help page. | |
(1) |
> | plot([y->FPDF(3,4,y),y->FPDF(5,20,y),y->FPDF(7,300,y)],0..5,color=[red,blue,black]); |
> | 1 - FCDF(15,12,2); |
(2) |
> |