Declaration:TCurveFit.CorrCoeff: double;
The read-only property CorrCoeff returns the correlation coefficient (Pearson's correlation coefficient) between the x- and y-values entered by the method EnterStatValue. Note, that at least 3 data pairs have to be entered to calculate a valid correlation coefficient.

Hint: Further background information on Pearson's correlation coefficient can be found in Fundamentals of Statistics.