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January 31, 2015

January 31, 2015

Posted by **Jaz** on Friday, December 6, 2013 at 11:21pm.

- Statistic -
**PsyDAG**, Saturday, December 7, 2013 at 7:32pmFind 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

95% = mean ± 1.96 SEm

SEm = SD/√n

I'll let you do the calculations.

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