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October 22, 2014

October 22, 2014

Posted by **metu** on Thursday, November 24, 2011 at 7:11pm.

- statistics -
**PsyDAG**, Saturday, November 26, 2011 at 1:09amWhat question(s) are you trying to answer?

Z = (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 related to your Z score.

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