condition mean min max ZT0-3 0.503873 0.503873 0.503873 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.386035 0.386035 0.386035 ZT20-23 0.37971299999999997 0.37971299999999997 0.37971299999999997