condition mean min max ZT0-3 1062.614603 1062.614603 1062.614603 ZT4-7 832.655638 832.655638 832.655638 ZT8-11 637.0473119999999 637.0473119999999 637.0473119999999 ZT12-15 619.1674065 619.1674065 619.1674065 ZT16-19 671.983292 671.983292 671.983292 ZT20-23 844.5083790000001 844.5083790000001 844.5083790000001