|   CP  |       −0.020777  |       0.006169  |       −3.368242  |       0.0012  |    
|   NI  |       −0.004278  |       0.002468  |       −1.733726  |       0.0868  |    
|   DL  |       −0.003180  |       0.001841  |       −1.727672  |       0.0879  |    
|   R² = 0.657725  |       `R² = 0.598567  |       F值 = 11.11800  |       显著性水平  |       0.0000  |