condition mean min max ZT0-3 0.02819711666666667 0.0 0.08459135000000001 ZT4-7 0.0395976 0.0395976 0.0395976 ZT8-11 0.0832788 0.0832788 0.0832788 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.08925340000000001 0.08925340000000001 0.08925340000000001