condition mean min max ZT0-3 32.15 32.15 32.15 ZT4-7 3.2 3.2 3.2 ZT8-11 32.55 32.55 32.55 ZT12-15 33.5 33.5 33.5 ZT16-19 8.95 8.95 8.95 ZT20-23 7.8 7.8 7.8