Summary statistics for drg1984 dataset : by Jean Roth , jroth@nber.org , 22 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- drg | 0 drgnum | 477 239 137.8423 1 477 drgweight | 477 1.1372 .8862174 0 6.8631 drgsys | 0 drgvers | 477 1 0 1 1 -------------+--------------------------------------------------------- trim | 477 234.8637 93.26609 0 440 alos | 477 7.290776 4.516771 0 24.1 fydate | 477 8674 0 8674 8674 fyear | 477 1984 0 1984 1984 by Jean Roth , jroth@nber.org , 22 Apr 2016