| 性状Attributes | x4 | x5 | x6 | x7 | Σ |
| x4 | 0.139 | 0.201 | 0.171 | 0.065 | 0.956 |
| x5 |
| 0.085 | 0.136 | 0.048 | |
| x6 |
|
| 0.060 | 0.041 | |
| x7 |
|
|
| 0.008 |