condition mean min max ZT0-3 0.313847 0.1379935 0.4897005 ZT4-7 0.5555565 0.5555565 0.5555565 ZT8-11 0.211313 0.211313 0.211313 ZT12-15 0 0 0 ZT16-19 0.34355199999999997 0.34355199999999997 0.34355199999999997 ZT20-23 0.1387475 0.1387475 0.1387475