condition mean min max ZT0-3 27.0 27.0 27.0 ZT4-7 3.2 3.2 3.2 ZT8-11 29.549999999999997 29.549999999999997 29.549999999999997 ZT12-15 18.4 18.4 18.4 ZT16-19 29.1 29.1 29.1 ZT20-23 29.799999999999997 29.799999999999997 29.799999999999997