condition mean min max ZT0-3 0.055868 0.055868 0.055868 ZT4-7 0.0 0.0 0.0 ZT8-11 0.1150787 0.1150787 0.1150787 ZT12-15 0.0323894 0.0323894 0.0323894 ZT16-19 0.02871915 0.02871915 0.02871915 ZT20-23 0.0423108 0.0423108 0.0423108