condition mean min max ZT0-3 16.3 16.3 16.3 ZT4-7 36.0 36.0 36.0 ZT8-11 37.4 37.4 37.4 ZT12-15 29.45 29.45 29.45 ZT16-19 20.9 20.9 20.9 ZT20-23 18.8 18.8 18.8