condition mean min max ZT0-3 25.3966 25.3966 25.3966 ZT4-7 16.3975 16.3975 16.3975 ZT8-11 15.817400000000001 15.817400000000001 15.817400000000001 ZT12-15 18.94265 18.94265 18.94265 ZT16-19 33.58935 33.58935 33.58935 ZT20-23 27.874299999999998 27.874299999999998 27.874299999999998