condition mean min max ZT0-3 0.404979 0.404979 0.404979 ZT4-7 0.254639 0.254639 0.254639 ZT8-11 0.47228950000000003 0.47228950000000003 0.47228950000000003 ZT12-15 0.436758 0.436758 0.436758 ZT16-19 1.2562449999999998 1.2562449999999998 1.2562449999999998 ZT20-23 0.6034390000000001 0.6034390000000001 0.6034390000000001