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Politics : A US National Health Care System? -- Ignore unavailable to you. Want to Upgrade?


To: John Koligman who wrote (2514)10/30/2007 2:56:23 PM
From: brushwud  Respond to of 42652
 
Does a significant percentage of our population really have an IQ lower than 75??? Do you have any idea how many? I'm surprised by that...

My simple understanding of IQ is that it's a normal (bell curve) distribution centered at 100 with a standard deviation of 15, so there are equally many below 75 as above 125, and that's a few percent.