condition mean min max ZT0-3 52.45 52.45 52.45 ZT4-7 3.4 3.4 3.4 ZT8-11 19.1 19.1 19.1 ZT12-15 24.25 24.25 24.25 ZT16-19 22.299999999999997 22.299999999999997 22.299999999999997 ZT20-23 24.05 24.05 24.05