condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.02639525 0.02639525 0.02639525 ZT12-15 0.0145874 0.0 0.0291748 ZT16-19 0.0 0.0 0.0 ZT20-23 0.02874755 0.02874755 0.02874755