condition mean min max ZT0-3 23.450000000000003 23.450000000000003 23.450000000000003 ZT4-7 24.5 24.5 24.5 ZT8-11 3.1 3.1 3.1 ZT12-15 22.45 22.45 22.45 ZT16-19 30.200000000000003 30.200000000000003 30.200000000000003 ZT20-23 23.3 23.3 23.3