Summary statistics for kneereplacementper1000medicareen variable in 1999_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
kneereplac~n |      1,325    5.209489    1.549435   1.361395   11.50872

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