condition mean min max ZT0-3 0.37356500000000004 0.37356500000000004 0.37356500000000004 ZT4-7 0.1630995 0.1630995 0.1630995 ZT8-11 0.1769785 0.1769785 0.1769785 ZT12-15 0.4841655 0.4841655 0.4841655 ZT16-19 0.8484054999999999 0.8484054999999999 0.8484054999999999 ZT20-23 0.35220399999999996 0.35220399999999996 0.35220399999999996