Table 3.

Performances of MLR models during testing.

Model	Type	MAE	RMSE	R2
1	Linear	2.375	3.142	0.564
2		2.500	3.240	0.573
3		2.375	3.142	0.518
4		2.000	2.550	0.616
5		2.250	3.041	0.572
6		3.750	4.000	0.024
1	Interaction	2.750	4.062	0.279
2		2.000	2.646	0.588
3		2.125	2.669	0.666
4		2.000	2.915	0.536
5		3.000	4.387	0.108
6		2.125	2.574	0.604
1	Pure quadratic	2.000	2.236	0.699
2		1.375	1.696	0.830
3		2.250	2.449	0.651
4		1.625	2.150	0.721
5		2.250	2.598	0.592
6		3.250	3.571	0.318
1	Quadratic	2.125	2.622	0.696
2		2.000	2.550	0.607
3		1.500	2.000	0.757
4		1.625	2.092	0.745
5		2.500	3.969	0.254
6		1.750	2.121	0.729