condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0763381 0.0763381 0.0763381 ZT12-15 0.0387375 0.0387375 0.0387375 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0