Summary statistics for clia_lab_classification_cd_4 variable in posclia2018 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
clia_lab_c~4 |    276,857    .0052735    .1622951          0          5

by Jean Roth , jroth@nber.org , 15 Feb 2019