| 相关系数 | X1 | X2 | X3 | X4 | X5 | X6 | X7 | 显著水平P | 
| X2 | −0.1311 | 
 | 
 | 
 | 
 | 
 | 
 | 0.0132 | 
| X3 | −0.1855 | −0.2007 | 
 | 
 | 
 | 
 | 
 | 0.0001 | 
| X4 | 0.1527 | 0.0096 | −0.0831 | 
 | 
 | 
 | 
 | 0.6145 | 
| X5 | −0.1138 | −0.2813 | 0.6532** | 0.0309 | 
 | 
 | 
 | 0.0001 | 
| X6 | −0.0586 | 0.0872 | 0.0873 | −0.0717 | −0.0056 | 
 | 
 | 0.4139 | 
| X7 | 0.5825** | 0.1186 | −0.4691* | 0.166 | −0.5133** | −0.0605 | 
 | 0.0001 | 
| Y | −0.1583 | −0.2664 | 0.6688** | −0.0551 | 0.8727** | 0.0892 | −0.5378** | 0.0001 |