Hi all, I thought that readers of R-Help might find the following article at ScienceNews of interest: Odds Are, It's Wrong Science fails to face the shortcomings of statistics By Tom Siegfried March 27th, 2010; Vol.177 #7 (p. 26) http://www.sciencenews.org/view/feature/id/57091/title/Odds_are,_its_wrong Regards, Marc Schwartz