Summary statistics for kneereplacementper1000medicareen variable in 1994_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
kneereplac~n |      1,200    4.431136    1.389755   1.198515   11.30416

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