condition mean min max ZT0-3 25.1 25.1 25.1 ZT4-7 29.4 29.4 29.4 ZT8-11 22.799999999999997 22.799999999999997 22.799999999999997 ZT12-15 22.75 22.75 22.75 ZT16-19 49.6 49.6 49.6 ZT20-23 51.55 51.55 51.55