condition mean min max ZT0-3 0.26714974999999996 0.134621 0.3996785 ZT4-7 0.2649845 0.2649845 0.2649845 ZT8-11 0.398848 0.398848 0.398848 ZT12-15 0 0 0 ZT16-19 0.528439 0.528439 0.528439 ZT20-23 0.7963229999999999 0.7963229999999999 0.7963229999999999