Posted by **Linda** on 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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**Ms. Sue**, Wednesday, October 8, 2008 at 11:38am
When you post your question, please tell us what you know about the answer and be specific about how you'd like us to help you.

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**lin**, Wednesday, October 8, 2008 at 11:49am
I don't understand how to do it, there are no examples in my book

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