condition mean min max ZT0-3 0.0402782 0.0244824 0.04872605 ZT4-7 0.0457862 0.0457862 0.0457862 ZT8-11 0.02368625 0.02368625 0.02368625 ZT12-15 0.047966274999999996 0.02303535 0.0728972 ZT16-19 0.02204395 0.02204395 0.02204395 ZT20-23 0.1013498 0.1013498 0.1013498