Summary statistics for factor dataset :

by Jean Roth , jroth@nber.org , 22 Oct 2016

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |     45,160    27.87513    16.27967          1         56
     st_case |     45,160    279391.9    162760.1      10001     560075
      veh_no |     45,160    1.524181    2.440984          1         90
     mfactor |     45,160    5.397121     22.3068          0         99

by Jean Roth , jroth@nber.org , 22 Oct 2016