Sum of Squares Calculator
The sum of squares, or sum of squared deviation scores, is a key measure of the variability of a set of data. The mean of the sum of squares (SS) is the variance of a set of scores, and the square root of the variance is its standard deviation.
This simple calculator uses the computational formula SS = ΣX^{2} - ((ΣX)^{2} / N) - to calculate the sum of squares for a single set of scores.
Just add your scores into the text box below, either one score per line or as a comma delimited list, and hit Calculate.
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