condition mean min max ZT0-3 0.050965166666666666 0.0 0.078608 ZT4-7 0.0738515 0.0738515 0.0738515 ZT8-11 0.2948555 0.2948555 0.2948555 ZT12-15 0.19075925 0.152285 0.2292335 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0