MeanVarVector

Declaration:

MeanVarVector (Data: TDoubleArray; First, Last: integer; var Mean, Variance: double): integer;

Calculates the mean and the variance of the data contained in the array Data, using all values from First to Last (the array Data has 0-based indices). If First is greater than Last then First and Last are automatically exchanged. The function returns the following error codes:  0 ... everything is OK -1 ... First and/or Last are out of range -2 ... the number of values is too low (minimum of 3 values required)