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December 22, 2014

December 22, 2014

Posted by **rhonda** on Wednesday, July 27, 2011 at 9:22am.

about the ourtown population distribution

- statistics -
**PsyDAG**, Wednesday, July 27, 2011 at 10:03amZ = (mean1 - mean2)/standard error (SE) of difference between means

SEdiff = √(SEmean1^2 + SEmean2^2)

SEm = SD/√(n-1)

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 that Z score.

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