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posted by Linda Wednesday, October 8, 2008 at 11:31am.

on a standard Iq test the scores are normally distributed with a mean of 100 and a standard devaition of 20. A. if you score 140 in whst precentile are you? B. if you score 90 on what percentil are you?

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I don't understand how to do it, there are no examples in my book

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