condition mean min max ZT0-3 0.28839644999999997 0.24388235 0.327657 ZT4-7 0.1738915 0.1738915 0.1738915 ZT8-11 0.5163915 0.5163915 0.5163915 ZT12-15 0.38561125 0.307493 0.4637295 ZT16-19 0.328179 0.328179 0.328179 ZT20-23 0.34103700000000003 0.34103700000000003 0.34103700000000003