condition mean min max ZT0-3 3412.85 3412.85 3412.85 ZT4-7 4101.0 4101.0 4101.0 ZT8-11 3578.5499999999997 3578.5499999999997 3578.5499999999997 ZT12-15 1890.3 1890.3 1890.3 ZT16-19 1107.9 1107.9 1107.9 ZT20-23 1949.6499999999999 1949.6499999999999 1949.6499999999999