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April 18, 2015

April 18, 2015

Posted by **Jessica** on Sunday, July 29, 2012 at 11:48pm.

- statistics -
**MathGuru**, Monday, July 30, 2012 at 5:25pmFind the z-score using a z-table that represents the top 40%. Then use z-score formula to find x.

z = (x - mean)/sd

mean = 500

sd = 100

I hope this will help get you started.

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