condition mean min max ZT0-3 0.322595325 0.322595325 0.322595325 ZT4-7 0.343766825 0.343766825 0.343766825 ZT8-11 0.3040422 0.3040422 0.3040422 ZT12-15 0.266450825 0.266450825 0.266450825 ZT16-19 0.3692803 0.3692803 0.3692803 ZT20-23 0.38842765 0.38842765 0.38842765