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September 1, 2014

September 1, 2014

Posted by **Phil** on Sunday, March 16, 2014 at 1:18am.

- Statistics (?) -
**PsyDAG**, Sunday, March 16, 2014 at 8:30pmNo data given.

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/probability related to the Z score. It is less that your level of significance?

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