condition mean min max ZT0-3 0.334275 0.334275 0.334275 ZT4-7 0.0 0.0 0.0 ZT8-11 0.1682745 0.1682745 0.1682745 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0