condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0334456 0.0334456 0.0334456 ZT8-11 0.0243698 0.0243698 0.0243698 ZT12-15 0.0 0.0 0.0 ZT16-19 0.02639055 0.02639055 0.02639055 ZT20-23 0.0 0.0 0.0