condition mean min max ZT0-3 24.55 24.55 24.55 ZT4-7 2.7 2.7 2.7 ZT8-11 3.1500000000000004 3.1500000000000004 3.1500000000000004 ZT12-15 12.1 12.1 12.1 ZT16-19 5.6 5.6 5.6 ZT20-23 7.85 7.85 7.85