Summary statistics for cholecystectomyper1000medicareen variable in 1999_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
cholecyste~n |      1,250    4.783728    1.464161   1.157254    15.3836

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