condition mean min max ZT0-3 478.03777776666664 478.03777776666664 478.03777776666664 ZT4-7 391.265 391.265 391.265 ZT8-11 597.23 597.23 597.23 ZT12-15 550.8188888999999 550.8188888999999 550.8188888999999 ZT16-19 553.2488889 553.2488889 553.2488889 ZT20-23 580.8088888666667 580.8088888666667 580.8088888666667