condition mean min max ZT0-3 0.3401475 0.3401475 0.3401475 ZT4-7 0.1171185 0.1171185 0.1171185 ZT8-11 0.06619855 0.06619855 0.06619855 ZT12-15 0.45763 0.45763 0.45763 ZT16-19 1.2645499999999998 1.2645499999999998 1.2645499999999998 ZT20-23 0.9128339999999999 0.9128339999999999 0.9128339999999999