condition mean min max ZT0-3 189.35 189.35 189.35 ZT4-7 134.4 134.4 134.4 ZT8-11 110.05 110.05 110.05 ZT12-15 158.8 158.8 158.8 ZT16-19 111.3 111.3 111.3 ZT20-23 142.85 142.85 142.85