condition mean min max ZT0-3 0.289124499 0.142973484 0.435275514 ZT4-7 0.91960344375 0.7186729825 1.120533905 ZT8-11 0.618483377 0.4317067415 0.8052600125 ZT12-15 0.721153113 0.388496244 1.053809982 ZT16-19 1.8281695502500002 1.471169715 2.1851693855 ZT20-23 2.7553300615000005 2.5979742210000003 2.912685902