Range: In medicine and statistics, the difference between the lowest and highest numeric values. For example, if five premature infants are born, weighing 2, 3, 4, 5, and 6 pounds, respectively, the range of their birth weights is 2 to 6 pounds. SLIDESHOW Heart Disease: Causes of a Heart Attack See Slideshow From Healthy Resources 10 Rheumatoid Arthritis SymptomsWhat Is Exocrine Pancreatic Insufficiency?Common Health Conditions Among Minorities Featured Centers Good and Bad Foods for PsoriasisVideo: Getting Personal on Life With MS Health Solutions From Our Sponsors Shot-Free MS Treatment Your Child and COVID-19