condition mean min max ZT0-3 19.79655 19.03035 20.56275 ZT4-7 13.372900000000001 13.372900000000001 13.372900000000001 ZT8-11 9.819344999999998 9.819344999999998 9.819344999999998 ZT12-15 0 0 0 ZT16-19 17.008650000000003 17.008650000000003 17.008650000000003 ZT20-23 23.57105 23.57105 23.57105