condition mean min max ZT0-3 30.54592 30.54592 30.54592 ZT4-7 30.831791 30.831791 30.831791 ZT8-11 47.578198 47.578198 47.578198 ZT12-15 47.276599000000004 47.276599000000004 47.276599000000004 ZT16-19 67.426775 67.426775 67.426775 ZT20-23 90.96924949999999 90.96924949999999 90.96924949999999