condition mean min max ZT0-3 30.273216666666666 22.50695 36.982150000000004 ZT4-7 16.8717 16.8717 16.8717 ZT8-11 17.3931 17.3931 17.3931 ZT12-15 25.809275 22.978 28.64055 ZT16-19 28.849 28.849 28.849 ZT20-23 40.418099999999995 40.418099999999995 40.418099999999995