condition mean min max ZT0-3 32.95 32.95 32.95 ZT4-7 40.8 40.8 40.8 ZT8-11 72.1 72.1 72.1 ZT12-15 73.55 73.55 73.55 ZT16-19 46.7 46.7 46.7 ZT20-23 54.05 54.05 54.05