condition mean min max ZT0-3 0.6142045 0.5424165 0.6859925 ZT4-7 3.72914 3.72914 3.72914 ZT8-11 3.1070149999999996 3.1070149999999996 3.1070149999999996 ZT12-15 0 0 0 ZT16-19 2.287345 2.287345 2.287345 ZT20-23 2.1479749999999997 2.1479749999999997 2.1479749999999997