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:
Who needs to apply for Medicare? You may not need to sign up for Original Medicare, Part A and Part B, but you may have options about the type of Medicare coverage you receive. To be eligible for Medicare, you must be either a U.S. citizen or a legal permanent resident of at least five continuous years. Generally, if you're receiving Social Security or Railroad Retirement Board (RRB) benefits, you'll be automatically enrolled in Medicare when you turn 65.