condition mean min max ZT0-3 29.5395 25.97705 33.10195 ZT4-7 38.0653 38.0653 38.0653 ZT8-11 26.32085 26.32085 26.32085 ZT12-15 0 0 0 ZT16-19 20.0785 20.0785 20.0785 ZT20-23 42.39765 42.39765 42.39765