condition mean min max ZT0-3 25.3 25.3 25.3 ZT4-7 24.5 24.5 24.5 ZT8-11 11.25 11.25 11.25 ZT12-15 47.75 47.75 47.75 ZT16-19 40.1 40.1 40.1 ZT20-23 22.85 22.85 22.85