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December 21, 2014

December 21, 2014

Posted by **Bhagya** on Friday, October 5, 2012 at 9:40pm.

Number mean Std deviation

Boys 100 32 10

girls 100 30 6

- statistics -
**PsyDAG**, Saturday, October 6, 2012 at 2:16pmZ = (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 related to the Z score. Relate that to your criterion for significance.

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