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December 25, 2014

December 25, 2014

Posted by **Gracie** on Tuesday, February 21, 2012 at 2:39pm.

- statistics -
**MathGuru**, Tuesday, February 21, 2012 at 5:29pmUse z-scores.

Formula:

z = (x - mean)/sd

You are looking to solve for x, so fill in the rest of the formula with what you know.

Find z using z-table (problem gives you percentage). Mean = 80 and standard deviation = 10.

I hope this will help get you started.

- statistics -
**Anonymous**, Sunday, March 17, 2013 at 7:11am88.1594

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