condition mean min max ZT0-3 0.2986028333333333 0.0 0.610055 ZT4-7 1.43125 1.43125 1.43125 ZT8-11 0.0 0.0 0.0 ZT12-15 1.5346704999999998 0.613181 2.4561599999999997 ZT16-19 0.5596805 0.5596805 0.5596805 ZT20-23 1.262715 1.262715 1.262715