condition mean min max ZT0-3 0.0143001275 0.0 0.028600255 ZT4-7 0.3532554885 0.3410489925 0.3654619845 ZT8-11 0.97294332175 0.910987851 1.0348987925 ZT12-15 1.9467976055 1.2020330765 2.6915621345 ZT16-19 3.6447163645000002 2.9091358515000003 4.3802968775 ZT20-23 4.911966148 4.184506825 5.639425471000001