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Can I just ask if someone has checked to make sure this image really appears in the source cited and that it is real data from a wide-ranging survey of some kind? I ask because I find it incredible that four groups were tested and found to have very different average IQ's, yet they all had the EXACT same frequency distribution of IQ relative to the mean. If that's what the data says, then I have no objections, but I just want to be sure we're not letting false information into the article under the assumption that it's legitimate. Soap— 
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