text: the chi square!? what is the chi square? why is it important? and what website has a picture/diagram of it? a chi square is a statistical test and to my knowledge, it doesn't look like a square (but it would be great because stats are boring)!  take a look at those links to get some info about it:  http://www.mste.uiuc.edu/patel/chisquare/intro.html http://math.hws.edu/javamath/ryan/chisquare.html http://www.georgetown.edu/faculty/ballc/webtools/web_chi_tut.html http://www.physics.csbsju.edu/stats/chi-square.html