Summary statistics for vision dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |     48,959    27.62287    16.27664          1         56
     st_case |     48,959    276918.9    162704.7      10001     560130
      veh_no |     48,959    1.503728    1.527978          1         58
    mvisobsc |     48,959    4.948447    21.33173          0         99

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