Summary statistics for kneereplacementper1000medicareen variable in 2002_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
kneereplac~n |        307    6.618204    1.452688   2.130206   11.31607

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