condition mean min max ZT0-3 0.38013474999999997 0.33545749999999996 0.42481199999999997 ZT4-7 2.77933 2.77933 2.77933 ZT8-11 5.19545 5.19545 5.19545 ZT12-15 0 0 0 ZT16-19 0.710909 0.710909 0.710909 ZT20-23 1.173821 1.173821 1.173821