condition mean min max ZT0-3 29.65 29.65 29.65 ZT4-7 32.9 32.9 32.9 ZT8-11 23.1 23.1 23.1 ZT12-15 36.85 36.85 36.85 ZT16-19 35.95 35.95 35.95 ZT20-23 37.05 37.05 37.05