condition mean min max ZT0-3 0.34785625 0.345082 0.35063049999999996 ZT4-7 0.4135455 0.4135455 0.4135455 ZT8-11 0.2872825 0.2872825 0.2872825 ZT12-15 0 0 0 ZT16-19 0.3762915 0.3762915 0.3762915 ZT20-23 0.2834155 0.2834155 0.2834155