On Thu, Feb 03, 2005 at 02:52:50PM -0500, Steve Simmons wrote: > IQ tests are normalized (ie, multipliers and other adjusters applied) > so the average is 100 and the standard deviation is 10. Plot the IQs > of a population as a graph, and you get a standard bell curve. In a > standard bell curve, approx 68% (I think) of the values are within 1 > standard deviation of the mean . . . Just found the reference book - yes, in a population which can be described with a bell curve, 68.2% of the members fall within one standard deviation of the mean. About 92% fall within two standard deviations. -- "In my darker moments I consider creating the eeyore fan club with a theme song by Leonard Cohen, logo by Edvard Munch and costumes by Tim Burton." -- anonymous, forwarded by Ellen.