condition mean min max ZT0-3 0.1616285 0.1616285 0.1616285 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0902155 0.0902155 0.0902155 ZT20-23 0.02228265 0.02228265 0.02228265