condition mean min max ZT0-3 24.9 24.9 24.9 ZT4-7 31.6 31.6 31.6 ZT8-11 24.45 24.45 24.45 ZT12-15 31.5 31.5 31.5 ZT16-19 35.05 35.05 35.05 ZT20-23 33.6 33.6 33.6