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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:

**x values:**

**Sxx: 33.50000**