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 qualify for Medicare at age 65, you need 40 credits or 10 years of work. You may qualify for Medicare through your own earnings history, your current spouse, former spouse or deceased spouse. (Note: State of Maine employees hired or rehired after March 31, 1986 are subject to the mandatory Medicare payroll tax of 1.45%. This also qualifies you for Medicare benefits.) You may also qualify for Medicare if you receive Social Security disability benefits.