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December 20, 2014

December 20, 2014

Posted by **K** on Saturday, May 22, 2010 at 7:29pm.

- statistics -
**PsyDAG**, Saturday, May 22, 2010 at 10:19pmZ = (mean1 - mean2)/standard error (SE) of difference between means

SEdiff = √(SEmean1^2 + SEmean2^2)

SEm = SD/√(n-1)

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score.

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