condition mean min max ZT0-3 0.41046 0.41046 0.41046 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 1.333275 1.333275 1.333275