Worker   Machine score
  1         A     52
  1         A     52.8
  1         A     53.1
  2         A     51.8
  2         A     52.8
  2         A     53.1
  3         A     60
  3         A     60.2
  3         A     58.4
  4         A     51.1
  4         A     52.3
  4         A     50.3
  5         A     50.9
  5         A     51.8
  5         A     51.4
  6         A     46.4
  6         A     44.8
  6         A     49.2
  1         B     62.1
  1         B     62.6
  1         B     64
  2         B     59.7
  2         B     60
  2         B     59
  3         B     68.6
  3         B     65.8
  3         B     69.7
  4         B     63.2
  4         B     62.8
  4         B     62.2
  5         B     64.8
  5         B     65
  5         B     65.4
  6         B     43.7
  6         B     44.2
  6         B     43
  1         C     67.5
  1         C     67.2
  1         C     66.9
  2         C     61.5
  2         C     61.7
  2         C     62.3
  3         C     70.8
  3         C     70.6
  3         C     71
  4         C     64.1
  4         C     66.2
  4         C     64
  5         C     72.1
  5         C     72
  5         C     71.1
  6         C     62
  6         C     61.4
  6         C     60.5