Summary statistics for kneereplacementper1000medicareen variable in 1997_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
kneereplac~n |         52    5.463315    1.253879   2.043178   8.277706

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