condition mean min max ZT0-3 32.3266 19.5619 51.335300000000004 ZT4-7 25.455550000000002 25.455550000000002 25.455550000000002 ZT8-11 39.8753 39.8753 39.8753 ZT12-15 62.1725 58.05565 66.28935 ZT16-19 69.59819999999999 69.59819999999999 69.59819999999999 ZT20-23 66.48610000000001 66.48610000000001 66.48610000000001