condition mean min max ZT0-3 0.25512325 0.1018305 0.408416 ZT4-7 0.304966 0.304966 0.304966 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0