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May 27, 2015

Homework Help: Trig. Math

Posted by Tami on Thursday, January 20, 2011 at 7:44pm.

The mean score on a normally distributed exam is 42 with a standard deviation of 12.1. Which socre would be expected to occur less than 5% of the time?
1) 25
2) 32
3) 60
4) 67

-I know the answer is 67, but i dont know why .. PLEASE help!

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