|   模型y3  |       B  |       标准错误  |       T  |       显著性  |       VIF  |    
|   常量  |       6613.737  |       2748.12  |       2.407  |       0.029*  |       
  |    
|   x1  |       −1744.43  |       629.134  |       −2.773  |       0.014*  |       1.259  |    
|   x2  |       6.814  |       3.13  |       2.177  |       0.046*  |       4.948  |    
|   x4  |       0.602  |       0.099  |       6.064  |       0.000**  |       4.902  |