condition mean min max ZT0-3 0.007062 0.007062 0.007062 ZT4-7 0.0 0.0 0.0 ZT8-11 0.01555 0.01555 0.01555 ZT12-15 0.0332171 0.0332171 0.0332171 ZT16-19 0.04462173333333333 0.04462173333333333 0.04462173333333333 ZT20-23 0.007576200000000001 0.007576200000000001 0.007576200000000001