condition mean min max ZT0-3 0.031357666666666666 0.0 0.0480242 ZT4-7 0.086926 0.086926 0.086926 ZT8-11 0.0441756 0.0441756 0.0441756 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0