condition mean min max ZT0-3 2.62692797875 2.079452601 3.1744033565 ZT4-7 2.9898929392499998 2.966314903 3.0134709754999998 ZT8-11 8.93193809075 3.505942199 14.357933982499999 ZT12-15 22.828432505000002 18.64903734 27.00782767 ZT16-19 12.43701198775 10.140333267499999 14.733690708 ZT20-23 5.4241289962499994 4.3022544675 6.546003525