condition mean min max ZT0-3 0.27949425 0.051698 0.5072905 ZT4-7 0.3075345 0.3075345 0.3075345 ZT8-11 0.258693 0.258693 0.258693 ZT12-15 0 0 0 ZT16-19 0.560322 0.560322 0.560322 ZT20-23 0.306785 0.306785 0.306785