condition mean min max ZT0-3 24.85 24.85 24.85 ZT4-7 38.8 38.8 38.8 ZT8-11 43.95 43.95 43.95 ZT12-15 12.15 12.15 12.15 ZT16-19 12.8 12.8 12.8 ZT20-23 13.2 13.2 13.2