condition mean min max ZT0-3 7.11582217625 2.8681039725 11.36354038 ZT4-7 10.1040107405 6.324077706000001 13.883943774999999 ZT8-11 15.772837165 14.8674644 16.67820993 ZT12-15 14.2971730425 14.147456135 14.446889950000001 ZT16-19 21.9790124925 18.172293455000002 25.78573153 ZT20-23 39.64471179 31.71039921 47.57902437