condition mean min max ZT0-3 0.02272765 0.02272765 0.02272765 ZT4-7 0.024163749999999998 0.024163749999999998 0.024163749999999998 ZT8-11 0.0 0.0 0.0 ZT12-15 0.002800691666666667 0.002800691666666667 0.002800691666666667 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0