condition mean min max ZT0-3 26.642583333333334 20.53125 30.8508 ZT4-7 15.808900000000001 15.808900000000001 15.808900000000001 ZT8-11 26.049950000000003 26.049950000000003 26.049950000000003 ZT12-15 48.404725 43.85385 52.955600000000004 ZT16-19 42.0106 42.0106 42.0106 ZT20-23 40.52005 40.52005 40.52005