condition mean min max ZT0-3 117.95 117.95 117.95 ZT4-7 54.1 54.1 54.1 ZT8-11 34.7 34.7 34.7 ZT12-15 44.55 44.55 44.55 ZT16-19 33.55 33.55 33.55 ZT20-23 87.05 87.05 87.05