| Model | Unstandardized coefficients | Standardized coefficients | T | Sig | |
| B | Std. error | Beta | |||
| Constant | 8.331 | 0.057 |
| 147.407 | 0.000 |
| Experience (exp) | 0.048 | 0.003 | 0.966 | 14.317 | 0.000 |
| Exp * exp | −0.001 | 0.000 | −0.750 | −10.775 | 0.000 |
| Secondary | 0.239 | 0.048 | 0.215 | 4.966 | 0.000 |
| Higher | 0.584 | 0. 050 | 0.521 | 11.717 | 0.000 |
| R = 0.425, R2 = 0.180, F = 168.969, dF = 4 | |||||