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December 19, 2014

December 19, 2014

Posted by **Jennifer** on Saturday, July 31, 2010 at 9:00pm.

- Statistics -
**Ms. Sue**, Saturday, July 31, 2010 at 9:13pmWhen you type the subject in the appropriate box, tutors can more easily identify questions in their fields of expertise.

- Statistics -
**PsyDAG**, Sunday, August 1, 2010 at 12:04pmZ = (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 corresponding the the Z score.

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