condition mean min max ZT0-3 26.8 26.8 26.8 ZT4-7 18.7 18.7 18.7 ZT8-11 5.45 5.45 5.45 ZT12-15 26.35 26.35 26.35 ZT16-19 16.35 16.35 16.35 ZT20-23 29.75 29.75 29.75