condition mean min max ZT0-3 29.85 29.85 29.85 ZT4-7 54.7 54.7 54.7 ZT8-11 30.6 30.6 30.6 ZT12-15 29.15 29.15 29.15 ZT16-19 78.75 78.75 78.75 ZT20-23 26.95 26.95 26.95