condition mean min max ZT0-3 0.5116248333333333 0.0 1.038359 ZT4-7 0.2648735 0.2648735 0.2648735 ZT8-11 0.0 0.0 0.0 ZT12-15 0.13159775 0.0 0.2631955 ZT16-19 0.5133585 0.5133585 0.5133585 ZT20-23 0.63649 0.63649 0.63649