condition mean min max ZT0-3 16.2 16.2 16.2 ZT4-7 36.0 36.0 36.0 ZT8-11 5.55 5.55 5.55 ZT12-15 25.3 25.3 25.3 ZT16-19 35.8 35.8 35.8 ZT20-23 6.75 6.75 6.75