condition mean min max ZT0-3 29.25 29.25 29.25 ZT4-7 48.9 48.9 48.9 ZT8-11 38.95 38.95 38.95 ZT12-15 30.1 30.1 30.1 ZT16-19 60.35 60.35 60.35 ZT20-23 15.799999999999999 15.799999999999999 15.799999999999999