condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0251197 0.0251197 0.0251197 ZT12-15 0.0 0.0 0.0 ZT16-19 0.006569216666666666 0.0 0.013138433333333333 ZT20-23 0 0 0