condition mean min max ZT0-3 52.568641 52.568641 52.568641 ZT4-7 48.317173 48.317173 48.317173 ZT8-11 55.242092 55.242092 55.242092 ZT12-15 60.6805055 60.6805055 60.6805055 ZT16-19 78.058265 78.058265 78.058265 ZT20-23 80.23197400000001 80.23197400000001 80.23197400000001