condition mean min max ZT0-3 1.79701 1.56208 2.03194 ZT4-7 2.56872 2.56872 2.56872 ZT8-11 1.89908 1.89908 1.89908 ZT12-15 0 0 0 ZT16-19 2.79764 2.79764 2.79764 ZT20-23 2.81115 2.81115 2.81115