condition mean min max ZT0-3 4379.0 4379.0 4379.0 ZT4-7 4712.0 4712.0 4712.0 ZT8-11 4010.6 4010.6 4010.6 ZT12-15 3831.8 3831.8 3831.8 ZT16-19 4276.35 4276.35 4276.35 ZT20-23 4325.15 4325.15 4325.15