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April 24, 2014

April 24, 2014

Posted by **Angela** on Wednesday, December 5, 2012 at 12:18pm.

- statistics -
**PsyDAG**, Wednesday, December 5, 2012 at 1:38pm95% = mean ± 1.96 SEm

SEm = SD/√n

Find the mean first = sum of scores/number of scores

Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance.

Standard deviation = square root of variance

I'll let you do the calculations.

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