condition mean min max ZT0-3 29.15 29.15 29.15 ZT4-7 12.3 12.3 12.3 ZT8-11 22.9 22.9 22.9 ZT12-15 37.55 37.55 37.55 ZT16-19 20.4 20.4 20.4 ZT20-23 32.2 32.2 32.2