Summary statistics for vision dataset :

by Jean Roth , jroth@nber.org , 18 Apr 2016

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |     43,996    27.90683    16.25253          1         56
     st_case |     43,996      279666    162489.3      10001     560121
      veh_no |     43,996    1.409696    .7762268          1         26
    mvisobsc |     43,996    3.432039    17.80485          0         99

by Jean Roth , jroth@nber.org , 18 Apr 2016