Chapter 12: Magnetic ink character recognition: number of read
checks (n), number of misread checks (d), and proportion of
misread checks (in percent).  

Col 1: Day
Col 2: Number of read checks (n).
Col 3: Number of misread checks (d).
Col 4: Proportion of misread checks (in %'s).
Row 21: Total.
Row 22: Average.
 
     Monday       930   8   0.86
     Tuesday     1080  12   1.11
     Wednesday   1050  16   1.52
     Thursday    1020   4   0.39
     Friday      1050   8   0.76 
     Monday      1040  14   1.35
     Tuesday      920  11   1.20
     Wednesday   1000  16   1.60
     Thursday     990   4   0.40
     Friday       950   8   0.84
     Monday       970  13   1.34 
     Tuesday      950   4   0.42
     Wednesday   1030   6   0.58 
     Thursday     980  13   1.33
     Friday      1050   4   0.36
     Monday      1070  12   1.12
     Tuesday      980  11   1.12
     Wednesday    940  19   2.02
     Thursday    1050  11   1.05 
     Friday       950   6   0.63
                20000 200
                 1000       1.00