condition mean min max ZT0-3 0.839556 0.376977 1.302135 ZT4-7 1.0429425 1.0429425 1.0429425 ZT8-11 1.410817 1.410817 1.410817 ZT12-15 0 0 0 ZT16-19 2.132825 2.132825 2.132825 ZT20-23 0.929708 0.929708 0.929708