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:
To be eligible for Medicare Supplement plans, you must be at least 65 years of age and enrolled in Medicare Part B. In some states, Medicare Supplements are only available to those over the age of 65.