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April 1, 2015

April 1, 2015

Posted by **annabelle** on Thursday, February 7, 2008 at 10:45pm.

X=66,X=48,X=84,X=55

- statistics -
**Reiny**, Friday, February 8, 2008 at 8:26amfor x=66 the z-score is (66-60)/12 = 0.5

do the rest the same way, the last one is (55-60)/12 = -0.417

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