Sum of Squares Calculator

Find the total sum of squared deviations from the mean.

Value 1

Value 2

Value 3

Value 4

Value 5

Sum of squares 218.8

Mean 13.2

Formula: SS = Σ(xᵢ − mean)²

Step-by-step with your numbers:

1. Values used:

2. Value 1 = 4

3. Value 2 = 8

4. Value 3 = 15

5. Value 4 = 16

6. Value 5 = 23

8. Sum of squares = 218.8

9. Mean = 13.2

Did we solve your problem today?

Sum of squares totals how far each value sits from the mean — the basis of variance.

The math behind it

SS = Σ(value − mean)². Variance = SS ÷ n (or n−1 for a sample).

4,8,15,16,23 → mean 13.2, SS 218.8.

Use?

Foundation of variance, ANOVA and regression.