Sunday

September 21, 2014

September 21, 2014

Posted by **Katie** on Sunday, February 24, 2013 at 9:17pm.

is it 16, 18, or 20

- statistics -
**MathGuru**, Monday, February 25, 2013 at 4:43pmFormula:

z = (x - mean)/sd

Plug in the numbers you know from the problem:

-3 = (x - 25)/3

Solve for x.

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