condition mean min max ZT0-3 26.682027 26.682027 26.682027 ZT4-7 88.9687855 88.9687855 88.9687855 ZT8-11 101.541718 101.541718 101.541718 ZT12-15 77.7338935 77.7338935 77.7338935 ZT16-19 49.384415000000004 49.384415000000004 49.384415000000004 ZT20-23 26.005029999999998 26.005029999999998 26.005029999999998