condition mean min max ZT0-3 4.32502 3.83519 4.81485 ZT4-7 3.033685 3.033685 3.033685 ZT8-11 5.874755 5.874755 5.874755 ZT12-15 0 0 0 ZT16-19 12.4936 12.4936 12.4936 ZT20-23 7.4428149999999995 7.4428149999999995 7.4428149999999995