When Designing a Research Study, the Nurse Should Have Which

When designing a research study, the nurse should have which of these understandings about independent and dependent variables?

A) All research problem statements should contain a dependent and an independent variable.
B) There should only be one dependent variable associated with a single independent variable.
C) The relationship between the independent and the dependent variable in any study should be causal.
D) A given characteristic or situation may be the dependent variable in one study and the independent variable in another.

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