condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.008091419 0.0 0.016182838 ZT8-11 0.012412248166666667 0.0 0.024824496333333335 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0