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January 30, 2015

January 30, 2015

Posted by **Tegan** on Tuesday, February 5, 2008 at 1:25am.

- statistics -
**drwls**, Tuesday, February 5, 2008 at 1:41amz/sigma = score - mean

2 sigma = 88 - mean

-sigma = 79 - mean

subtract second equation from first.

3 sigma = 9

sigma = 3 is the standard deviation

Use either equation to get the mean

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