condition mean min max ZT0-3 0.37433700000000003 0.3302755 0.4183985 ZT4-7 0.2500035 0.2500035 0.2500035 ZT8-11 0.21152935 0.21152935 0.21152935 ZT12-15 0 0 0 ZT16-19 0.205565 0.205565 0.205565 ZT20-23 0.5787104999999999 0.5787104999999999 0.5787104999999999