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January 29, 2015

January 29, 2015

Posted by **Anonymous** on Friday, July 5, 2013 at 4:40pm.

Thanks!!

- math -
**Kuai**, Friday, July 5, 2013 at 4:49pmz = (x -mean)/ sd

z = (72-68)/2

z= 4/2= 2

1-.9772 = .0228

2.28%

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