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November 28, 2015
Posted by **glenzy** on Friday, February 22, 2013 at 11:47am.

- statistics -
**PsyDAG**, Saturday, February 23, 2013 at 1:37pmSubtract 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