condition mean min max ZT0-3 82.16376666666667 66.36535 91.74325 ZT4-7 118.0995 118.0995 118.0995 ZT8-11 110.937 110.937 110.937 ZT12-15 75.943825 72.1489 79.73875 ZT16-19 101.01745 101.01745 101.01745 ZT20-23 88.8155 88.8155 88.8155