condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.274833 0.274833 0.274833 ZT12-15 0.13698825 0.0 0.2739765 ZT16-19 0.0 0.0 0.0 ZT20-23 0.2993255 0.2993255 0.2993255