condition mean min max ZT0-3 0.454943 0.319611 0.621228 ZT4-7 0.3043045 0.3043045 0.3043045 ZT8-11 0.105581 0.105581 0.105581 ZT12-15 0.6460172499999999 0.3080385 0.9839959999999999 ZT16-19 0.9974735 0.9974735 0.9974735 ZT20-23 0.673547 0.673547 0.673547