
Regression tree:
{'formula': 'Inc ~ .', 'data':       Inc Sex Mar  Age  Edu Occ  Res Dua  Per  Chi Hou Hom Eth  Lan
0       9   2   1    5  4.0   5  5.0   3  3.0    0   1   1   7  NaN
1       9   1   1    5  5.0   5  5.0   3  5.0    2   1   1   7    1
2       9   2   1    3  5.0   1  5.0   2  3.0    1   2   3   7    1
3       1   2   5    1  2.0   6  5.0   1  4.0    2   3   1   7    1
4       1   2   5    1  2.0   6  3.0   1  4.0    2   3   1   7    1
...   ...  ..  ..  ...  ...  ..  ...  ..  ...  ...  ..  ..  ..  ...
8988    1   2   5    1  1.0   2  5.0   1  3.0    2   3   1   7    1
8989    2   1   5    2  4.0   1  5.0   1  4.0    0   3   1   7    1
8990    1   2   5    1  2.0   1  5.0   1  3.0    2   3   1   7    1
8991    4   1   1    6  4.0   3  5.0   2  3.0    1   2   3   7    1
8992    6   1   5    3  4.0   1  5.0   1  1.0    0   2   3   5    1

[8993 rows x 14 columns], 'weights': None, 'subset': None}

Variables actually used in tree construction:
['Age', 'Chi', 'Dua', 'Edu', 'Eth', 'Hom', 'Hou', 'Lan', 'Mar', 'Occ', 'Per', 'Res', 'Sex']

Root node error: 69179/8993 = 7.6925

n=8993

           CP nsplit rel error  xerror      xstd
 1    0.22392      0         1  1.0003   0.00826
 2    0.08077      1   0.77608  0.7764 0.0088532
 3   0.044728      2   0.69531 0.69575 0.0091799
 4   0.030699      3   0.65058 0.65119 0.0093124
 5   0.013778      4   0.61988 0.62057 0.0089309
 6   0.013013      5    0.6061  0.6129 0.0089469
 7   0.012217      6   0.59309  0.6007 0.0088944
 8    0.01186      7   0.58087 0.59329 0.0087837
 9  0.0075503      8   0.56901 0.57358 0.0082915
10  0.0060297      9   0.56146 0.56727 0.0082959
11  0.0058936     10   0.55543  0.5625 0.0082659
12  0.0058179     11   0.54954 0.56085 0.0082265
13  0.0056115     12   0.54372 0.55751 0.0081632
14  0.0052484     13   0.53811 0.55205 0.0080911
15  0.0029893     14   0.53286 0.53772 0.0080402
16  0.0021926     15   0.52987 0.53618 0.0080492
17  0.0020195     16   0.52768 0.53644 0.0080947
18  0.0020188     17   0.52566 0.53479 0.0080923
19  0.0019891     18   0.52364 0.53479 0.0080923
20  0.0018678     19   0.52165 0.53399 0.0080819
21  0.0018067     20   0.51979 0.53356 0.0080966
22  0.0016202     21   0.51798 0.53074 0.0080705
23  0.0015428     22   0.51636 0.52817 0.0080593
24  0.0013878     23   0.51482 0.52733 0.0080432
25  0.0013376     25   0.51204 0.52751 0.0080712
26  0.0013004     26    0.5107 0.52712 0.0081224
27  0.0012727     27    0.5094  0.5274 0.0081597
28  0.0012212     28   0.50813 0.52784 0.0081836
29  0.0011047     29   0.50691 0.52794   0.00821
30   0.001076     30    0.5058 0.52783 0.0082644
31  0.0010668     31   0.50473 0.52763 0.0082696
32 0.00094022     33   0.50259 0.52762 0.0083448
33 0.00092518     34   0.50165 0.52784 0.0083828
34 0.00092162     38   0.49777 0.52722 0.0083989
35 0.00091488     39   0.49685 0.52712 0.0083975
36 0.00091399     40   0.49594 0.52675 0.0083968
37 0.00088117     41   0.49502 0.52673 0.0083933
38 0.00087456     42   0.49414 0.52654 0.0083967
39 0.00087045     43   0.49327 0.52644  0.008399
40 0.00085493     44    0.4924 0.52597  0.008407
41 0.00081217     45   0.49154 0.52639 0.0084233
42 0.00079792     46   0.49073 0.52608 0.0084233
43 0.00079523     47   0.48993 0.52618 0.0084347
44 0.00077363     48   0.48914 0.52617 0.0084361
45 0.00074574     52   0.48593 0.52692 0.0084655
46 0.00068929     53   0.48519 0.52829 0.0085022
47 0.00068145     54    0.4845 0.52787 0.0085137
48 0.00064324     56   0.48313 0.52627 0.0084956
49 0.00063956     57   0.48249  0.5261 0.0084882
50 0.00063504     59   0.48121 0.52635 0.0084912
51 0.00063287     60   0.48058 0.52641 0.0084962
52 0.00062823     61   0.47994 0.52672 0.0085138
53 0.00061486     62   0.47932 0.52707 0.0085392
54  0.0006117     63    0.4787  0.5274 0.0085732
55 0.00059932     65   0.47748 0.52814 0.0085834
56 0.00058876     67   0.47628 0.52847 0.0086078
57 0.00058134     68   0.47569 0.52984 0.0086483
58 0.00057982     70   0.47453 0.53023 0.0086672
59 0.00057958     71   0.47395 0.53023 0.0086672
60 0.00057614     72   0.47337 0.53024 0.0086626
61 0.00056309     73   0.47279 0.53096 0.0086785
62 0.00056219     74   0.47223 0.53116 0.0086945
63 0.00056005     75   0.47167 0.53107  0.008691
64  0.0005494     76   0.47111 0.53148 0.0087021
65 0.00054554     77   0.47056 0.53281 0.0087378
66 0.00054349     78   0.47001  0.5327  0.008738
67 0.00053429     79   0.46947 0.53329 0.0087657
68 0.00052221     80   0.46893 0.53377 0.0087925
69 0.00052132     81   0.46841 0.53358 0.0087983
70 0.00051347     82   0.46789 0.53399 0.0088171
71 0.00050821     84   0.46686 0.53489 0.0088502
72  0.0005052     85   0.46636 0.53445 0.0088499
73 0.00050345     86   0.46585  0.5341 0.0088435
74 0.00050196     87   0.46535  0.5345  0.008848
75      5e-04     88   0.46484 0.53494 0.0088577
CP            0.000855
nsplit       44.000000
rel error     0.492396
xerror        0.525975
xstd          0.008407
Name: 40, dtype: float64
CP            0.001868
nsplit       19.000000
rel error     0.521653
xerror        0.533990
xstd          0.008082
Name: 20, dtype: float64
n= 8993 

node), split, n, deviance, yval
      * denotes terminal node

  1) root 8993 69178.9100 4.895029  
    2) Hou=2,3 5646 37580.7100 3.884520  
      4) Age< 1.5 853  2426.6570 1.526377  
        8) Occ=1,5,6 689   127.4194 1.047896 *
        9) Occ=2,3,4,7,8,9 164  1478.7800 3.536585 *
      5) Age>=1.5 4793 29566.4900 4.304194  
       10) Occ=2,3,4,5,6,7,8,9 3399 20470.6000 3.789644  
         20) Mar=2,3,4,5 2631 15683.4000 3.511593  
           40) Hom=3,4,5 1406  5963.8180 3.146515  
             80) Occ=5,6,7,8,9 631  2663.1510 2.564184 *
             81) Occ=2,3,4 775  2912.4700 3.620645  
              162) Age< 2.5 279   913.7061 2.931900 *
              163) Age>=2.5 496  1791.9680 4.008065 *
           41) Hom=1,2 1225  9317.1020 3.930612 *
         21) Mar=1 768  3886.9530 4.742188  
           42) Edu< 3.5 384  1737.9900 4.005208  
             84) Edu< 2.5 91   360.4615 2.923077 *
             85) Edu>=2.5 293  1237.8700 4.341297 *
           43) Edu>=3.5 384  1731.8330 5.479167  
             86) Age< 2.5 64   275.7344 4.140625 *
             87) Age>=2.5 320  1318.4970 5.746875 *
       11) Occ=1 1394  6001.6760 5.558824  
         22) Dua=1,3 1062  4420.1880 5.216573  
           44) Age< 2.5 248  1112.8670 4.157258 *
           45) Age>=2.5 814  2944.2420 5.539312 *
         23) Dua=2 332  1059.1660 6.653614 *
    3) Hou=1 3347 16107.5200 6.599641  
      6) Mar=3,4,5 918  5604.2060 5.303922  
       12) Occ=2,3,4,5,6,7,8,9 555  3442.3170 4.527928 *
       13) Occ=1 363  1316.7160 6.490358 *
      7) Mar=1,2 2429  8379.6140 7.089337  
       14) Occ=2,3,4,5,6,7,8,9 1340  5336.1870 6.524627  
         28) Edu< 3.5 450  2062.6240 5.748889  
           56) Edu< 2.5 66   346.9848 4.348485 *
           57) Edu>=2.5 384  1563.9580 5.989583 *
         29) Edu>=3.5 890  2865.8470 6.916854  
           58) Hom=3,4,5 45   267.2000 5.200000 *
           59) Hom=1,2 845  2458.9420 7.008284 *
       15) Occ=1 1089  2090.2880 7.784206 *
