condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0212364 0.0212364 0.0212364 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0280912 0.0280912 0.0280912 ZT16-19 0.05595 0.05595 0.05595 ZT20-23 0.05549285 0.05549285 0.05549285