| Parameters | Model | A | b | Determination coefficient R2 | Jackknife R2 | Test of Jackknife |
| Schaefer model |
| 1.65593 | −0.000005 | 0.45 | 0.32 | Good |
| Fox model |
| 1.955182 | −0.000005 | 0.43 | 0.25 | Good |