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December 18, 2014

December 18, 2014

Posted by **STatistic** on Monday, June 28, 2010 at 7:22pm.

- statistics -
**PsyDAG**, Tuesday, June 29, 2010 at 11:00amI don't know what your 5-step method is. Here is what I do.

Z = (mean1 - mean2)/standard error (SE) of difference between means

SEdiff = √(SEmean1^2 + SEmean2^2)

SEm = SD/√(n-1)

If can only calculate one SEm, 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 that Z score.

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