Summary statistics for kneereplacementper1000medicareen variable in 1993_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
kneereplac~n |         52    4.235841     1.11088   1.331919    6.41479

by Jean Roth , jroth@nber.org , 14 Mar 2018