condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0204979 0.0204979 0.0204979 ZT8-11 0.0166074 0.0166074 0.0166074 ZT12-15 0.0943742 0.0943742 0.0943742 ZT16-19 0.0357127 0.0357127 0.0357127 ZT20-23 0.03553635 0.03553635 0.03553635