condition mean min max ZT0-3 0.18339316666666666 0.126496 0.263044 ZT4-7 0.034745399999999996 0.034745399999999996 0.034745399999999996 ZT8-11 0.0179746 0.0179746 0.0179746 ZT12-15 0.019674575 0.01948175 0.0198674 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0188787 0.0188787 0.0188787