condition mean min max ZT0-3 1.7743914842500002 1.595316604 1.9534663645 ZT4-7 13.91501979725 9.3675436695 18.462495925 ZT8-11 24.9676161825 20.6513839 29.283848465 ZT12-15 97.23125544 77.21155764 117.25095324 ZT16-19 111.921832075 108.71515105 115.1285131 ZT20-23 172.591463 122.981851 222.201075