condition mean min max ZT0-3 100.565824 100.565824 100.565824 ZT4-7 82.584592 82.584592 82.584592 ZT8-11 120.16842249999999 120.16842249999999 120.16842249999999 ZT12-15 139.2587085 139.2587085 139.2587085 ZT16-19 144.59699849999998 144.59699849999998 144.59699849999998 ZT20-23 113.721234 113.721234 113.721234