condition mean min max ZT0-3 0.49563640724999997 0.477531437 0.5137413774999999 ZT4-7 3.1497197850000003 0.8261048665000001 5.4733347035 ZT8-11 39.495632156250004 22.2262356725 56.765028640000004 ZT12-15 175.58590421000002 153.02845962 198.1433488 ZT16-19 124.6887328 110.64795605 138.72950955 ZT20-23 81.850284985 74.45616958 89.24440039000001