Summary statistics for kneereplacementper1000medicareen variable in 1992_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
kneereplac~n |        307    4.268418    1.195363   1.527214   8.121231

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