condition mean min max ZT0-3 0.19898483333333333 0.0 0.403502 ZT4-7 0.0 0.0 0.0 ZT8-11 0.37046199999999996 0.37046199999999996 0.37046199999999996 ZT12-15 0.1850045 0.0 0.370009 ZT16-19 0.5312125 0.5312125 0.5312125 ZT20-23 1.205528 1.205528 1.205528