Do a paper of a Research in Nursing

Compare independent variables, dependent variables, and extraneous variables. Compare independent variables, dependent variables, and extraneous variables. Describe two ways that researchers attempt to control extraneous variables.
Describe two ways that researchers attempt to control extraneous variables. Support
your answer with peer-reviewed articles.
Describe the "levels of evidence" and provide an example of the type of practice change
that could result from each.

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APA 754 words