An analyst needs to determine the median age of the US patient population with health insurance. Which sample is representative of this population?

This group is limited to a specific subset of the population that only includes younger individuals with Medicaid coverage. Such a narrow focus excludes older patients and those with other forms of health insurance, leading to a skewed representation that does not reflect the median age of the overall insured population.

University students typically represent a younger demographic, often under 30, who are covered through their parents' health plans. This sample does not provide a comprehensive view of the entire insured population, as it excludes older adults and various other insurance types, thus failing to capture the median age accurately.

This choice focuses solely on older adults who qualify for Medicare, which does not reflect the entire spectrum of the insured population. By only considering those 65 and older, this sample overlooks younger insured individuals, leading to an inaccurate representation of the median age.