condition mean min max ZT0-3 0.53774476775 0.375680326 0.6998092094999999 ZT4-7 2.3845677655 1.7879996839999999 2.981135847 ZT8-11 2.460997913 2.3323910139999997 2.589604812 ZT12-15 4.44932076475 3.605421875 5.2932196545 ZT16-19 7.352361596 6.1991830475 8.5055401445 ZT20-23 8.722289200499999 8.629032361499998 8.8155460395