condition mean min max ZT0-3 0.32738625 0.273999 0.3807735 ZT4-7 0.466989 0.466989 0.466989 ZT8-11 0.601829 0.601829 0.601829 ZT12-15 0 0 0 ZT16-19 0.2423135 0.2423135 0.2423135 ZT20-23 0.461542 0.461542 0.461542