condition mean min max ZT0-3 98.5 98.5 98.5 ZT4-7 41.6 41.6 41.6 ZT8-11 38.05 38.05 38.05 ZT12-15 63.05 63.05 63.05 ZT16-19 60.95 60.95 60.95 ZT20-23 81.95 81.95 81.95