condition mean min max ZT0-3 0.2525786666666667 0.1373185 0.353289 ZT4-7 0.1260985 0.1260985 0.1260985 ZT8-11 0.132601 0.132601 0.132601 ZT12-15 1.0406027500000001 0.854598 1.2266075 ZT16-19 0.570416 0.570416 0.570416 ZT20-23 0.5684555 0.5684555 0.5684555