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:
If you are age 18 to 64, your eligibility for Medicare is tied to your eligibility for Social Security Disability Income (SSDI) benefits. One exception is for people with end-stage renal disease (ESRD) , who are automatically eligible for Medicare solely on the basis of having ESRD.