condition mean min max ZT0-3 33.40205 33.40205 33.40205 ZT4-7 107.37735 107.37735 107.37735 ZT8-11 55.9874 55.9874 55.9874 ZT12-15 22.7754 22.7754 22.7754 ZT16-19 16.8823 16.8823 16.8823 ZT20-23 11.444845 11.444845 11.444845