condition mean min max ZT0-3 36.45 36.45 36.45 ZT4-7 30.5 30.5 30.5 ZT8-11 28.6 28.6 28.6 ZT12-15 42.2 42.2 42.2 ZT16-19 26.05 26.05 26.05 ZT20-23 42.15 42.15 42.15