condition mean min max ZT0-3 593.471289 593.471289 593.471289 ZT4-7 594.2070825000001 594.2070825000001 594.2070825000001 ZT8-11 508.1088615 508.1088615 508.1088615 ZT12-15 709.400042 709.400042 709.400042 ZT16-19 571.816238 571.816238 571.816238 ZT20-23 568.488679 568.488679 568.488679