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Bill_McGrath comments on Undiscriminating Skepticism - Less Wrong
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Ah; so I'm misunderstanding what brazil84 means by average?
No, I think his example of 5 ethnic groups is flawed, because he's using the wrong metric to calculate the average. If he was using the median instead of the mean -- which is the right thing to do in this case -- he'd obtain the result that "most blacks have average intelligence", and his conclusion would no longer follow.
(Edited: typo)
The 5 ethnic groups was mine originally.
But then I have to consider the scenario where the median gives the result of below averge intelligence - will take me slightly longer to puzzle out in my head.