Summary statistics for vision dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |        449          43           0         43         43
     st_case |        449    430168.8    95.61131     430001     430333
      veh_no |        449    1.316258    .5807387          1          4
    mvisobsc |        449    1.523385    12.01227          0         98

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