condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.327301 0.327301 0.327301 ZT12-15 0.84368975 0.6800740000000001 1.0073055 ZT16-19 0.3046075 0.3046075 0.3046075 ZT20-23 0.0 0.0 0.0