condition mean min max ZT0-3 0.015118566666666666 0.0 0.0453557 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.022736175 0.0 0.04547235 ZT16-19 0.0451613 0.0451613 0.0451613 ZT20-23 0.0 0.0 0.0