condition mean min max ZT0-3 0.34161463099999995 0.0 0.6832292619999999 ZT4-7 0.5894157393333334 0.0 1.1788314786666667 ZT8-11 0.4572699355 0.0 0.914539871 ZT12-15 0.0 0.0 0.0 ZT16-19 0.08324045966666667 0.0 0.16648091933333334 ZT20-23 0.09625939500000001 0.0 0.19251879000000002