condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.021912428666666664 0.0 0.04382485733333333 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.007674458166666668 0.0 0.015348916333333336 ZT20-23 0.007045195999999999 0.0 0.014090391999999998