Summary statistics for kneereplacementper1000medicareen variable in 1993_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
kneereplac~n |        307    4.330197    1.137434   1.331919   8.261044

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