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January 27, 2015

January 27, 2015

Posted by **Julia Brown** on Friday, June 4, 2010 at 8:31pm.

- Statistics -
**PsyDAG**, Saturday, June 5, 2010 at 11:09amZ = (mean1 - mean2)/standard error (SE) of difference between means

SEdiff = √(SEmean1^2 + SEmean2^2)

SEm = SD/√(n-1)

Since 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 the Z score. Is Z > 1.96?

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