condition mean min max ZT0-3 65.75 65.75 65.75 ZT4-7 55.3 55.3 55.3 ZT8-11 43.95 43.95 43.95 ZT12-15 49.8 49.8 49.8 ZT16-19 72.15 72.15 72.15 ZT20-23 72.9 72.9 72.9