condition mean min max ZT0-3 0.288728 0.288728 0.288728 ZT4-7 0.24930549999999999 0.24930549999999999 0.24930549999999999 ZT8-11 0.358441 0.358441 0.358441 ZT12-15 1.1069200000000001 1.1069200000000001 1.1069200000000001 ZT16-19 0.896569 0.896569 0.896569 ZT20-23 0.709774 0.709774 0.709774