obs    X1      X2     X3     X4      X5         X6         Y  
  1      8      1      1      1      0.541    -0.099    10.006  
  2      8      1      1      0      0.13      0.07      9.737  
  3      8      1      1      0      2.116     0.115    15.087  
  4      0      0      9      1     -2.397     0.252     8.422  
  5      0      0      9      1     -0.046     0.017     8.625  
  6      0      0      9      1      0.365     1.504    16.289  
  7      2      7      0      1      1.996    -0.865     5.958  
  8      2      7      0      1      0.228    -0.055     9.313  
  9      2      7      0      1      1.38      0.502    12.96  
 10      0      0      0     10     -0.798    -0.399     5.541  
 11      0      0      0     10      0.257     0.101     8.756  
 12      0      0      0     10      0.44      0.432    10.937