Summary statistics for vision dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |     44,992    27.87889    16.29343          1         56
     st_case |     44,992    279448.9    162906.6      10001     560131
      veh_no |     44,992    1.442901    1.002601          1         40
    mvisobsc |     44,992    3.994066    19.21443          0         99

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