Summary statistics for kneereplacementper1000medicareen variable in 1994_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
kneereplac~n |         52    4.617319    1.177771   1.668679   7.181381

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