Another stats related blip, may well be a running theme for a while. If it's stats made simple...why such a big book? I used to be really good at stats, got A's (and good one's at that) in my A level stats modules, where did all that info go? It's probably been replaced with knowledge like the bump between your eyebrow's being called the glabella, gynocomastia is the proper word for man boobs, and that actually, there is no funny bone (sad fact).