Summary statistics for ndctype dataset :

by Jean Roth , jroth@nber.org , 11 May 2018

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
         ndc |          0
   ndclength |    119,085    9.301415    .4588744          9         10
     dashloc |    119,085    5.882882    .3215622          5          6
     ndctype |          0

by Jean Roth , jroth@nber.org , 11 May 2018