Is it true that an apple a day keeps the doctor away? A study designed and conducted by the National Health and Nutrition Examination Study (results published in the Journal of the American Medical Association) considered 8,399 American adults of whom 756 reported that they ate a small apple a day. The rest did not eat apples or ate them infrequently. The number of healthcare visits in the previous 36 months was recorded. Conduct a test to determine whether the adage is true.