| 样本 | X1 | X2 | X3 | X4 |
| 抽蓄1 | 0.4826 | 0.5073 | 0.5075 | 0.5324 |
| 抽蓄2 | 0.5071 | 0.5073 | 0.5038 | 0.5477 |
| 抽蓄3 | 0.5018 | 0.4776 | 0.4891 | 0.4564 |
| 抽蓄4 | 0.5081 | 0.5073 | 0.4993 | 0.4564 |