condition mean min max ZT0-3 0.40981525 0.36968100000000004 0.4499495 ZT4-7 0.784736 0.784736 0.784736 ZT8-11 0.5441819999999999 0.5441819999999999 0.5441819999999999 ZT12-15 0 0 0 ZT16-19 0.7268955 0.7268955 0.7268955 ZT20-23 0.687944 0.687944 0.687944