idadec  cigarrosc gestacaoc  sobrevc freq
  0       0        0       0     50     
  0       0        0       1    315
  0       0        1       0     24
  0       0        1       1   4012
  0       1        0       0      9     
  0       1        0       1     40
  0       1        1       0      6 
  0       1        1       1    459
  1       0        0       0     41
  1       0        0       1    147
  1       0        1       0     14
  1       0        1       1   1594
  1       1        0       0      4   
  1       1        0       1     11
  1       1        1       0      1     
  1       1        1       1    124