condition mean min max ZT0-3 0.5699179999999999 0.5699179999999999 0.5699179999999999 ZT4-7 0.577168 0.577168 0.577168 ZT8-11 0.9189449999999999 0.9189449999999999 0.9189449999999999 ZT12-15 0.56638 0.56638 0.56638 ZT16-19 1.033466 1.033466 1.033466 ZT20-23 0.866267 0.866267 0.866267