STATISTICS WEBSITES
http://www.neatideas.com/cc.htm
http://mathworld.wolfram.com/CorrelationCoefficient.html
http://noppa5.pc.helsinki.fi/koe/corr/cor7.html
http://www.mega.nu:8080/ampp/rummel/uc.htm
http://www.duxbury.com/authors/mcclellandg/tiein/johnson.htm
http://www.animatedsoftware.com/statglos/sgstat_t.htm
http://www-micro.msb.le.ac.uk/1010/1011-20.html