condition mean min max ZT0-3 82.25 82.25 82.25 ZT4-7 32.5 32.5 32.5 ZT8-11 91.9 91.9 91.9 ZT12-15 44.8 44.8 44.8 ZT16-19 79.05 79.05 79.05 ZT20-23 49.65 49.65 49.65