Summary statistics for vision dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |     45,142     27.8753    16.27875          1         56
     st_case |     45,142    279393.6      162751      10001     560075
      veh_no |     45,142      1.5245    2.441466          1         90
    mvisobsc |     45,142    4.389837    20.09984          0         99

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