Open Access

Table 3

The statistical parameters of the developed GEP model for prediction of damaged permeability.

Parameter Value
Training set
R2,a 0.9841
Average relative deviation, %b 0.0629
Average absolute relative deviation, %c 0.6565
Root mean square errord 0.0990
Number of data samples 345
Test set
R 2 0.9858
Average relative deviation, % −0.0746
Average absolute relative deviation, % 0.5782
Root mean square error 0.0872
Number of data samples 86
R 2 0.9843
Average relative deviation, % 0.0355
Average absolute relative deviation, % 0.6409
Root mean square error 0.0967
Number of data samples 431

Determination coefficient:


Average relative deviation percent (ARD):


Average absolute relative deviation percent (AARD):


Root mean square error (RMSE):

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