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September 30, 2014

September 30, 2014

Posted by **Laura** on Sunday, April 1, 2012 at 2:04pm.

- statistics -
**MathGuru**, Monday, April 2, 2012 at 7:08pmUse z-scores.

z = (x - mean)/sd

x = 115

mean = 100

sd = 15

Use a z-table to find probability of less than 115 using the z-score calculated above. Convert to a percent.

I hope this will help.

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