condition mean min max ZT0-3 60.05 60.05 60.05 ZT4-7 37.7 37.7 37.7 ZT8-11 29.3 29.3 29.3 ZT12-15 32.85 32.85 32.85 ZT16-19 66.5 66.5 66.5 ZT20-23 76.05 76.05 76.05