Created
October 3, 2013 04:31
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Variance Formula
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| Variance = SD^2 | |
| SD^2 = [SUM((X-M)^2)]/N | |
| Square the deviation so it doesn't sum to zero | |
| SQRT(SD^2) = SD | |
| SS = SUM of Squares = SUM((X-M)^2 | |
| MS = Mean Squares = [SUM((X-M)^2)]/N | |
| For inferential stats use: | |
| [SUM((X-M)^2)]/N-1 |
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