condition mean min max ZT0-3 38.35 38.35 38.35 ZT4-7 42.9 42.9 42.9 ZT8-11 22.55 22.55 22.55 ZT12-15 26.7 26.7 26.7 ZT16-19 45.6 45.6 45.6 ZT20-23 37.65 37.65 37.65