condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 3.88771 3.88771 3.88771 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 3.8164749999999996 3.8164749999999996 3.8164749999999996 ZT20-23 1.909805 1.909805 1.909805