condition mean min max ZT0-3 0.007842 0.007842 0.007842 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.021127049999999998 0.021127049999999998 0.021127049999999998 ZT20-23 0.026202916666666666 0.026202916666666666 0.026202916666666666