condition mean min max ZT0-3 0.0202441 0.0 0.0314583 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.14553775 0.10007 0.1910055 ZT16-19 0.0280862 0.0280862 0.0280862 ZT20-23 0.065736 0.065736 0.065736