condition mean min max ZT0-3 71.55 71.55 71.55 ZT4-7 40.5 40.5 40.5 ZT8-11 38.45 38.45 38.45 ZT12-15 33.5 33.5 33.5 ZT16-19 42.95 42.95 42.95 ZT20-23 58.8 58.8 58.8