condition mean min max ZT0-3 0.06072745 0.01997935 0.1023715 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.010015375 0.0 0.02003075 ZT16-19 0.0198937 0.0198937 0.0198937 ZT20-23 0.0 0.0 0.0