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:
Overview. Medicare is a federal health insurance program that covers millions of Americans. In general, you are eligible for Medicare if you are 65 or older, or you are younger than 65 and meet criteria for certain disabilities, or have End-Stage Renal Disease (ESRD). The Medicare basics have four main components.