Summary statistics for vision dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |        385          43           0         43         43
     st_case |        385    430141.6    83.13036     430001     430288
      veh_no |        385    1.314286    .5884554          1          4
    mvisobsc |        385    .2467532    4.841648          0         95

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