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:
Medicare is a government-run health insurance program for people age 65 and older, as well as disabled individuals. To qualify for Medicare at age 65, you or your spouse must have: 1  Worked and paid Medicare taxes for 10 years.  Medicare taxes were withheld from your wages, just like Social Security.