Table 3.

RMSE for the training, validation, and test sets and MAPE for the test set for the regression models with linear terms. We also include the reference Kozeny-Carman model in this category.

No.	RMSE	Val	Test	MAPE (%)
	Train			Test
Kozeny-Carman model
–	0.084	0.084	0.086	14.986
Unscaled models
1	0.046	0.046	0.047	8.291
2	0.370	0.371	0.376	98.028
3	0.163	0.163	0.167	29.719
4	0.068	0.069	0.069	12.011
5	0.233	0.238	0.243	51.563
6	0.049	0.050	0.051	8.351
7	0.033	0.034	0.034	5.536
Rescaled models
1${}^{\prime }$	0.052	0.051	0.052	8.653
2${}^{\prime }$	0.360	0.361	0.365	96.907
3${}^{\prime }$	0.078	0.078	0.081	14.363
4${}^{\prime }$	0.059	0.058	0.060	10.315
5${}^{\prime }$	0.165	0.164	0.168	33.823
6${}^{\prime }$	0.043	0.044	0.045	7.488
7${}^{\prime }$	0.029	0.030	0.031	5.063