| Model | Unstandardized coefficients | Standardized coefficients | T | Sig | |
| B | Std. error | Beta | |||
| Constant | 8.212 | 0.080 |
| 102.565 | 0.000 |
| Experience (exp) | 0.035 | 0.005 | 0.724 | 7.563 | 0.000 |
| Exp * exp | 0.000 | 0.000 | −0.513 | −5.154 | 0.000 |
| Secondary | 0.331 | 0.070 | 0.299 | 4.754 | 0.000 |
| Higher | 0.740 | 0.072 | 0.670 | 10.290 | 0.000 |
| R = 0.444, R2 = 0.198, F = 91.221, dF = 4 | |||||