condition mean min max ZT0-3 24.129649999999998 24.129649999999998 24.129649999999998 ZT4-7 19.78335 19.78335 19.78335 ZT8-11 28.6968 28.6968 28.6968 ZT12-15 22.713900000000002 22.713900000000002 22.713900000000002 ZT16-19 37.2055 37.2055 37.2055 ZT20-23 25.533450000000002 25.533450000000002 25.533450000000002