Frequencies for stud_tbx variable in fmli132 dataset :

   stud_tbx |      Freq.     Percent        Cum.
------------+-----------------------------------
          A |      6,724       99.44       99.44
          B |         19        0.28       99.72
          D |         19        0.28      100.00
------------+-----------------------------------
      Total |      6,762      100.00

by Jean Roth , jroth@nber.org , 17 Mar 2016