condition mean min max ZT0-3 0.08124125 0.0 0.1624825 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.327994 0.327994 0.327994 ZT20-23 0.1638085 0.1638085 0.1638085