condition mean min max ZT0-3 0.02273265 0.0 0.0454653 ZT4-7 0.0478966 0.0478966 0.0478966 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0