In statistics, Sxx represents the sum of squared deviations from the mean value of x.

This value is often calculated when fitting a linear regression model by hand.

To calculate Sxx for a given regression model, simply enter the list of the comma-separated values for the x-values of the dataset in the box below, then click the “Calculate” button:

1, 2, 2, 3, 5, 8

Sxx: 33.50000