condition mean min max ZT0-3 0.063164 0.05972233333333333 0.06660566666666666 ZT4-7 0.32467799999999997 0.32467799999999997 0.32467799999999997 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0