condition mean min max ZT0-3 0.04267575 0.0 0.0853515 ZT4-7 0.1320937 0.1320937 0.1320937 ZT8-11 0.08768765 0.08768765 0.08768765 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.04338655 0.04338655 0.04338655