condition mean min max ZT0-3 0.41904399999999997 0.414055 0.424033 ZT4-7 0.853245 0.853245 0.853245 ZT8-11 0.425388 0.425388 0.425388 ZT12-15 0 0 0 ZT16-19 0.8333619999999999 0.8333619999999999 0.8333619999999999 ZT20-23 1.1514615 1.1514615 1.1514615