condition mean min max ZT0-3 26.45 26.45 26.45 ZT4-7 3.2 3.2 3.2 ZT8-11 21.45 21.45 21.45 ZT12-15 8.35 8.35 8.35 ZT16-19 25.3 25.3 25.3 ZT20-23 26.8 26.8 26.8