condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.057123017500000005 0.0 0.11424603500000001 ZT8-11 0.028423031166666664 0.0 0.05684606233333333 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0253345105 0.0 0.050669021 ZT20-23 0.0628299515 0.0 0.125659903