condition mean min max ZT0-3 34.85 34.85 34.85 ZT4-7 3.2 3.2 3.2 ZT8-11 24.25 24.25 24.25 ZT12-15 6.45 6.45 6.45 ZT16-19 18.15 18.15 18.15 ZT20-23 47.65 47.65 47.65