Test No. X1 X2 X3 Test value (Ye) Simulated value (NL) Error [%]
1 -1 -0.5 0 29.3 28.4 -3.17
2 0.5 1 0 29.6 30.4 2.70
3 0 0.5 1 28.2 27.5 -2.55
Table 4: Data of regression model validation ( λ1 =0.5, λ2 =0.5).