STATS (STeve's Attempt to Teach Statistics)
The link is outdated: http://www.cmh.edu/stats/
A very comprehensive site on statistics. Pediatric Research, stats links (http://www.cmh.edu/stats/, outdated), Using SPSS to manage your Research data (http://www.cmh.edu/stats/training/hand01.asp, outdated).
Link added: June 22, 2015
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