Summary statistics for kneereplacementper1000medicareen variable in 1999_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
kneereplac~n |        307    5.436469    1.303767   1.568254   9.845201

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