condition mean min max ZT0-3 0.3681295 0.3681295 0.3681295 ZT4-7 0.1492175 0.1492175 0.1492175 ZT8-11 0.21623599999999998 0.21623599999999998 0.21623599999999998 ZT12-15 0.41692799999999997 0.41692799999999997 0.41692799999999997 ZT16-19 1.12214 1.12214 1.12214 ZT20-23 0.749577 0.749577 0.749577