Summary statistics for vision dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |     46,000    27.99883    16.23349          1         56
     st_case |     46,000    280627.3    162313.5      10001     560113
      veh_no |     46,000    1.429065    .8788247          1         31
    mvisobsc |     46,000    3.791848    18.72528          0         99

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