condition mean min max ZT0-3 0.341082 0.106988 0.575176 ZT4-7 0.576 0.576 0.576 ZT8-11 0.6869695 0.6869695 0.6869695 ZT12-15 0 0 0 ZT16-19 1.0029965 1.0029965 1.0029965 ZT20-23 0.8467745 0.8467745 0.8467745