Variable | Main effects | N3 | D1 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
OLS | WLS | OLS | WLS | OLS | WLS | |||||||
Coef | SE | Coef | SE | Coef | SE | Coef | SE | Coef | SE | Coef | SE | |
Constant | 0.071 | 0.007 | 0.071 | 0.007 | 0.067 | 0.007 | 0.070 | 0.007 | ||||
MO2 | 0.102 | 0.005 | 0.100 | 0.005 | 0.101 | 0.005 | 0.099 | 0.005 | 0.167 | 0.007 | 0.166 | 0.007 |
MO3 | 0.279 | 0.007 | 0.280 | 0.007 | 0.275 | 0.007 | 0.279 | 0.007 | 0.365 | 0.014 | 0.370 | 0.014 |
SC2 | 0.102 | 0.005 | 0.101 | 0.005 | 0.103 | 0.005 | 0.101 | 0.005 | 0.169 | 0.007 | 0.169 | 0.007 |
SC3 | 0.242 | 0.006 | 0.244 | 0.006 | 0.239 | 0.007 | 0.243 | 0.007 | 0.330 | 0.015 | 0.336 | 0.015 |
UA2 | 0.087 | 0.006 | 0.085 | 0.006 | 0.086 | 0.006 | 0.084 | 0.006 | 0.151 | 0.007 | 0.150 | 0.007 |
UA3 | 0.222 | 0.006 | 0.223 | 0.006 | 0.217 | 0.007 | 0.222 | 0.007 | 0.308 | 0.013 | 0.313 | 0.014 |
PD2 | 0.110 | 0.006 | 0.110 | 0.006 | 0.110 | 0.006 | 0.109 | 0.006 | 0.175 | 0.007 | 0.175 | 0.007 |
PD3 | 0.237 | 0.006 | 0.240 | 0.006 | 0.232 | 0.007 | 0.239 | 0.007 | 0.323 | 0.014 | 0.329 | 0.014 |
AD2 | 0.075 | 0.005 | 0.074 | 0.005 | 0.074 | 0.005 | 0.073 | 0.005 | 0.139 | 0.009 | 0.138 | 0.009 |
AD3 | 0.177 | 0.006 | 0.180 | 0.006 | 0.172 | 0.007 | 0.178 | 0.007 | 0.262 | 0.014 | 0.267 | 0.014 |
N3 | 0.016‡ | 0.009 | 0.005§ | 0.009 | ||||||||
D1 | − 0.073 | 0.013 | − 0.077 | 0.014 | ||||||||
I2 | 0.009§ | 0.017 | 0.015§ | 0.018 | ||||||||
I2sq | − 0.000§ | 0.003 | − 0.000§ | 0.003 | ||||||||
I3 | − 0.022‡ | 0.013 | − 0.028† | 0.013 | ||||||||
I3sq | 0.001§ | 0.003 | 0.003§ | 0.002 | ||||||||
Fit statistics | ||||||||||||
Adjusted R2 | 0.993 | 0.995 | 0.993 | 0.995 | 0.999 | 0.999 | ||||||
MAE | 0.018 | 0.017 | 0.017 | 0.017 | 0.017 | 0.017 | ||||||
RMSE | 0.024 | 0.024 | 0.024 | 0.024 | 0.024 | 0.023 | ||||||
No. (of 97) > 0.025 | 28 | 29 | 27 | 28 | 27 | 28 | ||||||
No. (of 97) > 0.05 | 2 | 3 | 2 | 3 | 2 | 2 |