condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.03720885 0.03720885 0.03720885 ZT8-11 0.03539795 0.03539795 0.03539795 ZT12-15 0.04299475 0.04299475 0.04299475 ZT16-19 0.08099915 0.08099915 0.08099915 ZT20-23 0.0 0.0 0.0