condition mean min max ZT0-3 0.007160887666666667 0.0 0.014321775333333333 ZT4-7 0.0 0.0 0.0 ZT8-11 0.028849757833333333 0.0 0.057699515666666666 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0074762890000000005 0.0 0.014952578000000001 ZT20-23 0.008213077000000001 0.0 0.016426154000000002