condition mean min max ZT0-3 0.012213283333333333 0.0 0.03663985 ZT4-7 1.21426 1.21426 1.21426 ZT8-11 2.913015 2.913015 2.913015 ZT12-15 0.6427175 0.0 1.285435 ZT16-19 0.0 0.0 0.0 ZT20-23 3.96003 3.96003 3.96003