condition mean min max ZT0-3 0.5395258333333334 0.2920875 0.766345 ZT4-7 0.0 0.0 0.0 ZT8-11 0.3707125 0.3707125 0.3707125 ZT12-15 0.44607600000000003 0.369557 0.522595 ZT16-19 1.0285760000000002 1.0285760000000002 1.0285760000000002 ZT20-23 0.77872 0.77872 0.77872