Summary statistics for kneereplacementper1000medicareen variable in 1998_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
kneereplac~n |        307     5.42612    1.295678     2.0759   9.553655

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