condition mean min max ZT0-3 0.60499 0.60499 0.60499 ZT4-7 0.0 0.0 0.0 ZT8-11 2.046585 2.046585 2.046585 ZT12-15 1.10517 1.10517 1.10517 ZT16-19 0.728235 0.728235 0.728235 ZT20-23 1.0883895 1.0883895 1.0883895