| slope | Y intercept | correlation coefficient R | |
| WY (mm) | 0.95 | 0.019 | 0.86 |
| PIA (˚) | 1.28 | 0.46 | 0.84 |
| AA (˚) | 0.78 | 10.62 | 0.89 |
| RI (˚) | 1.06 | 0.43 | 0.86 |