condition mean min max ZT0-3 0.0341056385 0.0 0.068211277 ZT4-7 0.0092818105 0.0 0.018563621 ZT8-11 0.0 0.0 0.0 ZT12-15 0.010467205 0.0 0.02093441 ZT16-19 0.023023374333333332 0.0 0.046046748666666665 ZT20-23 0.008213077000000001 0.0 0.016426154000000002