condition mean min max ZT0-3 0.792657427 0.72170998 0.863604874 ZT4-7 0.597379664 0.5919228105 0.6028365175 ZT8-11 0.704296094 0.6964971424999999 0.7120950455 ZT12-15 0.29613703475 0.23065388450000002 0.36162018500000004 ZT16-19 0.26656014825 0.22056462300000002 0.3125556735 ZT20-23 0.65624599625 0.47393888549999996 0.838553107