condition mean min max ZT0-3 0.478008 0.411315 0.544701 ZT4-7 0.946245 0.946245 0.946245 ZT8-11 0.5464975 0.5464975 0.5464975 ZT12-15 0 0 0 ZT16-19 0.539682 0.539682 0.539682 ZT20-23 0.5412635 0.5412635 0.5412635