condition mean min max ZT0-3 19.05 19.05 19.05 ZT4-7 36.8 36.8 36.8 ZT8-11 21.85 21.85 21.85 ZT12-15 35.45 35.45 35.45 ZT16-19 21.9 21.9 21.9 ZT20-23 17.7 17.7 17.7