condition mean min max ZT0-3 17.4928813175 16.580905175 18.40485746 ZT4-7 27.444085292500002 22.393582395000003 32.49458819 ZT8-11 26.811389615000003 26.64449823 26.978281000000003 ZT12-15 9.916293968 5.4327068825 14.3998810535 ZT16-19 7.5701279945 6.0315068345 9.1087491545 ZT20-23 7.739950684999999 7.384672898 8.095228471999999