condition mean min max ZT0-3 0.014289999999999999 0.014289999999999999 0.014289999999999999 ZT4-7 0.0285696 0.0285696 0.0285696 ZT8-11 0.008381 0.008381 0.008381 ZT12-15 0.01635205 0.01635205 0.01635205 ZT16-19 0.022108633333333336 0.022108633333333336 0.022108633333333336 ZT20-23 0.006823 0.006823 0.006823