condition mean min max ZT0-3 0.0273307 0.0273307 0.0273307 ZT4-7 0.05537175 0.05537175 0.05537175 ZT8-11 0.05385105 0.05385105 0.05385105 ZT12-15 0.044374800000000006 0.044374800000000006 0.044374800000000006 ZT16-19 0.0508734 0.0508734 0.0508734 ZT20-23 0.01002765 0.01002765 0.01002765