condition mean min max ZT0-3 0.699918 0.699918 0.699918 ZT4-7 0.3705035 0.3705035 0.3705035 ZT8-11 0.325386 0.325386 0.325386 ZT12-15 1.0517595 1.0517595 1.0517595 ZT16-19 1.52154 1.52154 1.52154 ZT20-23 1.0155785 1.0155785 1.0155785