condition mean min max ZT0-3 26.983249999999998 26.983249999999998 26.983249999999998 ZT4-7 25.4625 25.4625 25.4625 ZT8-11 27.0103 27.0103 27.0103 ZT12-15 21.2015 21.2015 21.2015 ZT16-19 26.61975 26.61975 26.61975 ZT20-23 22.17795 22.17795 22.17795