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February 1, 2015

February 1, 2015

Posted by **mike** on Tuesday, April 9, 2013 at 11:33am.

- social science statistics -
**PsyDAG**, Tuesday, April 9, 2013 at 2:36pmZ = (mean1 - mean2)/standard error (SE) of difference between means

SEdiff = √(SEmean1^2 + SEmean2^2)

SEm = SD/√n

If only one SD is provided, you can use just that to determine SEdiff.

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

- social science statistics -
**Anonymous**, Wednesday, April 24, 2013 at 2:38pmyes

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