Summary statistics for kneereplacementper1000medicareen variable in 2001_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
kneereplac~n |        307    6.173568    1.406499   2.073558   10.37254

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