condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.057123017500000005 0.0 0.11424603500000001 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.06392668383333333 0.0 0.12785336766666666 ZT20-23 0.0 0.0 0.0