condition mean min max ZT0-3 0.046717 0.039446 0.053988 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.015916116666666667 0.0 0.031832233333333335 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0