Summary statistics for kneereplacementper1000medicareen variable in 2007_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
kneereplac~n |        307    8.997153    1.756454   2.909816   15.10763

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