condition mean min max ZT0-3 29.6 29.6 29.6 ZT4-7 9.9 9.9 9.9 ZT8-11 9.8 9.8 9.8 ZT12-15 28.35 28.35 28.35 ZT16-19 16.3 16.3 16.3 ZT20-23 44.95 44.95 44.95