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January 30, 2015

January 30, 2015

Posted by **Mark** on Monday, October 3, 2011 at 6:37pm.

Any help is super appriciated.. thanks sooo much.

- Math -
**PsyDAG**, Tuesday, October 4, 2011 at 8:40pmThe individual scores you have been given are raw scores.

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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