condition mean min max ZT0-3 24.5 24.5 24.5 ZT4-7 9.1 9.1 9.1 ZT8-11 24.1 24.1 24.1 ZT12-15 25.95 25.95 25.95 ZT16-19 29.6 29.6 29.6 ZT20-23 26.35 26.35 26.35