Table 8 Evaluation of Statistical analysis of AI models performance in the NVI prediction.

From: Enhancement of groundwater resources quality prediction by machine learning models on the basis of an improved DRASTIC method

AI models

Training phase

R

RMSE

MAE

SI

 GEP

0.9958

2.766

1.721

0.0724

 EPR

0.9999

0.2460

0.191

0.0064

 MARS

0.9998

0.5970

0.443

0.0156

 M5MT

0.9984

1.6790

1.189

0.0439

AI Models

Testing phase

R

RMSE

MAE

SI

 GEP

0.9920

3.491

2.673

0.0781

 EPR

0.9999

0.210

0.171

0.0040

 MARS

0.9966

2.408

1.341

0.0530

 M5MT

0.9956

2.988

1.996

0.0580

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