condition mean min max ZT0-3 1.003484 1.003484 1.003484 ZT4-7 0.4382885 0.4382885 0.4382885 ZT8-11 1.0815679999999999 1.0815679999999999 1.0815679999999999 ZT12-15 1.662075 1.662075 1.662075 ZT16-19 1.72052 1.72052 1.72052 ZT20-23 0.720626 0.720626 0.720626