condition mean min max ZT0-3 0.35742525 0.2545755 0.460275 ZT4-7 0.889841 0.889841 0.889841 ZT8-11 1.55112 1.55112 1.55112 ZT12-15 0 0 0 ZT16-19 1.52698 1.52698 1.52698 ZT20-23 1.079717 1.079717 1.079717