condition mean min max ZT0-3 9.626763 9.626763 9.626763 ZT4-7 10.741109999999999 10.741109999999999 10.741109999999999 ZT8-11 11.1973005 11.1973005 11.1973005 ZT12-15 9.533075499999999 9.533075499999999 9.533075499999999 ZT16-19 9.885004 9.885004 9.885004 ZT20-23 10.126297999999998 10.126297999999998 10.126297999999998