Summary statistics for drg2004 dataset : by Jean Roth , jroth@nber.org , 22 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- drg | 0 drgnum | 540 270.5 156.0288 1 540 drgweight | 540 1.440618 1.768366 0 18.6081 drgdesc | 0 drgsys | 0 -------------+--------------------------------------------------------- drgvers | 540 21 0 21 21 glos | 540 4.013704 3.114738 0 34.2 trim | 540 15.59259 61.40456 0 420 low | 0 alos | 540 5.312593 4.163753 0 42.4 -------------+--------------------------------------------------------- mdc | 517 8.940039 6.086129 0 25 medsurg | 0 fydate | 540 15979 0 15979 15979 fyear | 540 2004 0 2004 2004 mdcdesc | 0 by Jean Roth , jroth@nber.org , 22 Apr 2016