condition mean min max ZT0-3 78.63589999999999 78.63589999999999 78.63589999999999 ZT4-7 79.1909 79.1909 79.1909 ZT8-11 81.4976 81.4976 81.4976 ZT12-15 68.14949999999999 68.14949999999999 68.14949999999999 ZT16-19 63.09935 63.09935 63.09935 ZT20-23 61.17615 61.17615 61.17615