condition mean min max ZT0-3 0.0184535 0.0 0.0553605 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0253825 0.0 0.050765 ZT16-19 0.0 0.0 0.0 ZT20-23 0.110924 0.110924 0.110924