Summary statistics for kneereplacementper1000medicareen variable in 1992_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
kneereplac~n |         52    4.217217    1.192626   1.527214   6.582382

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