condition mean min max ZT0-3 3.5202599999999995 3.5202599999999995 3.5202599999999995 ZT4-7 0.3006575 0.3006575 0.3006575 ZT8-11 0.319014 0.319014 0.319014 ZT12-15 1.3933149999999999 1.3933149999999999 1.3933149999999999 ZT16-19 1.9078 1.9078 1.9078 ZT20-23 1.0013 1.0013 1.0013