condition mean min max ZT0-3 5.465879999999999 0.5692 8.736564999999999 ZT4-7 1.3730799999999999 1.3730799999999999 1.3730799999999999 ZT8-11 0.982396 0.982396 0.982396 ZT12-15 1.9352800000000001 0.22738 3.64318 ZT16-19 2.58849 2.58849 2.58849 ZT20-23 8.407105 8.407105 8.407105