condition mean min max ZT0-3 1846.65 1846.65 1846.65 ZT4-7 1662.9 1662.9 1662.9 ZT8-11 1678.45 1678.45 1678.45 ZT12-15 1777.95 1777.95 1777.95 ZT16-19 1708.9499999999998 1708.9499999999998 1708.9499999999998 ZT20-23 1893.65 1893.65 1893.65