condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0464854 0.0464854 0.0464854 ZT8-11 0.050441 0.050441 0.050441 ZT12-15 0.0919955 0.0919955 0.0919955 ZT16-19 0.04020425 0.04020425 0.04020425 ZT20-23 0.0399401 0.0399401 0.0399401