condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.01041785 0.01041785 0.01041785 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0207781 0.0207781 0.0207781 ZT16-19 0.01829235 0.01829235 0.01829235 ZT20-23 0.013571360000000001 0.013571360000000001 0.013571360000000001