condition mean min max ZT0-3 49.1 49.1 49.1 ZT4-7 84.2 84.2 84.2 ZT8-11 72.95 72.95 72.95 ZT12-15 60.2 60.2 60.2 ZT16-19 46.8 46.8 46.8 ZT20-23 29.85 29.85 29.85