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Model summary and parameter estimation of SKT fitting.
| Model | Model summary |
Parameter estimation |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| R2 | F | df1 | df2 | Sig. | Constant | b1 | b2 | b3 | |
| Inverse function | 0.612 | 489.410 | 1 | 310 | 0.000 | 35.401 | 0.326 | – | – |
| Quadratic function | 0.523 | 169.514 | 2 | 309 | 0.000 | 35.756 | −0.102 | 0.008 | – |
| Cubic function | 0.766 | 335.247 | 3 | 308 | 0.000 | 36.011 | −0.307 | 0.049 | −0.002 |
| System function | 0.612 | 488.391 | 1 | 310 | 0.000 | 3.567 | 0.009 | – | – |
