condition mean min max ZT0-3 0.3083166666666667 0.0 0.6905805 ZT4-7 0.0 0.0 0.0 ZT8-11 0.6451264999999999 0.6451264999999999 0.6451264999999999 ZT12-15 0.7545345 0.4765795 1.0324895 ZT16-19 0.408868 0.408868 0.408868 ZT20-23 0.0 0.0 0.0