condition mean min max ZT0-3 34.65 34.65 34.65 ZT4-7 26.2 26.2 26.2 ZT8-11 28.799999999999997 28.799999999999997 28.799999999999997 ZT12-15 35.8 35.8 35.8 ZT16-19 21.5 21.5 21.5 ZT20-23 35.0 35.0 35.0