Sxx Command
From GeoGebra Manual
- Sxx( <List of Numbers> )
- Calculates the statistic \sum x^2 - \frac{(\sum x)^2}{n}.
- Sxx( <List of Points> )
- Calculates the statistic \sum x^2 - \frac{(\sum x)^2}{n} using the x-coordinates of the given points.
