| 
 | X9 | X10 | X11 | X12 | X13 | 
| X9 | 1.000 | 0.992 | 0.998 | 0.999 | 0.998 | 
| X10 | 0.992 | 1.000 | 0.997 | 0.997 | 0.996 | 
| X11 | 0.998 | 0.997 | 1.000 | 1.000 | 0.999 | 
| X12 | 0.999 | 0.997 | 1.000 | 1.000 | 0.999 | 
| X13 | 0.998 | 0.996 | 0.999 | 0.999 | 1.000 | 
| 均值 | 0.9974 | 0.9964 | 0.9988 | 0.9990 | 0.9984 |