condition mean min max ZT0-3 0.5422586666666667 0.2870255 1.0009925 ZT4-7 1.0792055 1.0792055 1.0792055 ZT8-11 0.666145 0.666145 0.666145 ZT12-15 0.898775 0.51172 1.28583 ZT16-19 0.0 0.0 0.0 ZT20-23 0.788825 0.788825 0.788825