Table 3.

The MSE and R² values for performance of the ANN with 18 neurons in hidden layer

MQ variables	MSE		R2
	Train	Test	Train	Test
MR	0.0739 ± 0.006	0.1839 ± 0.019	0.97673 ± 0. 001	0.9341 ± 0.052
HRY	0.7058 ± 0.225	1.6912 ± 0.216	0.9729 ± 0.004	0.9440 ± 0.083
Whiteness	0.1354 ± 0.015	0.2582 ± 0.033	0.8221 ± 0.012	0.7279 ± 0.050
DOM	0.0178 ± 0.002	0.0232 ± 0.100	0.7610 ± 0.013	0.7782 ± 0.022