condition mean min max ZT0-3 79.03983333333333 79.03983333333333 79.03983333333333 ZT4-7 150.68599999999998 150.68599999999998 150.68599999999998 ZT8-11 32.5878 32.5878 32.5878 ZT12-15 5.042815 5.042815 5.042815 ZT16-19 1.26003 1.26003 1.26003 ZT20-23 12.1867 12.1867 12.1867