condition mean min max ZT0-3 0.3811955 0.3811955 0.3811955 ZT4-7 0.3060115 0.3060115 0.3060115 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.089728 0.089728 0.089728 ZT20-23 1.0622265 1.0622265 1.0622265