From GeoGebra Manual
- SigmaXX[ <List of Numbers> ]
- Calculates the sum of squares of the given numbers.
- Example: In order to work out the variance of a list you may use
SigmaXX[list] / Length[list] - Mean[list]^2.
- SigmaXX[ <List of Points> ]
- Calculates the sum of squares of the x-coordinates of the given points.
| Following text is about a feature that is supported only in GeoGebra 4.2.