condition mean min max ZT0-3 47.2 47.2 47.2 ZT4-7 58.8 58.8 58.8 ZT8-11 55.95 55.95 55.95 ZT12-15 81.95 81.95 81.95 ZT16-19 84.75 84.75 84.75 ZT20-23 71.7 71.7 71.7