Summary statistics for clia_lab_classification_cd_3 variable in posclia2016 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
clia_lab_c~3 |    309,046    .0113737    .2382003          0          5

by Jean Roth , jroth@nber.org , 10 Jan 2017