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 = ΣX2 - ((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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