A variable that we purposefully change or manipulate is called the independent variable. The thing that changes in response is called the dependent variable. This creates a cause and effect relationship.
Medicare Eligibility Requirements. To be entitled to Medicare, you must be a U.S. citizen or a permanent legal resident, and answer yes to at least one (1) of the following questions:
In order to qualify for Medicare (title XVIII of the Social Security Act) an individual 1) must qualify for Social Security Act Title II benefits (SSDI benefits) and 2) meet certain other qualifications. An individual qualifies for SSDI benefits by being insured and age 62 or disabled under the Social Security Act definition (with other exceptions).