| Model | Unstandardized Coefficients | Standardized Coefficients | t | Sig. | ||
| Β | Std. Error | Beta | ||||
| 1 | (Constant) | 2.76 | 0.16 | 17.64 | 0 | |
| ER | 0.21 | 0.04 | 0.31 | 4.97 | 0 | |
| 2 | (Constant) | 2.43 | 0.21 | 11.54 | 0 | |
| ER | 0.20 | 0.04 | 0.29 | 4.57 | 0 | |
| POS | 0.10 | 0.05 | 0.15 | 2.32 | 0.02 | |