| 性状Attributes | x4 | x5 | x6 | x8 | Σ |
| x4 | 0.151 | 0.350 | 0.103 | −0.055 | 0.844 |
| x5 |
| 0.219 | 0.127 | −0.062 | |
| x6 |
|
| 0.020 | −0.018 | |
| x8 |
|
|
| 0.008 |