NRS433 Introduction to Nursing Research NRS 433 / NRS433 / NRS433V / NRS433 V Week 4 Discussion DQ1 Compare independent variables, dependent variables, and extraneous variables. Describe two ways that researchers attempt to control extraneous variables. Support your answer with peer-reviewed articles. DQ2 Describe the seven “levels of evidence” and provide an example of the type of practice change that could result from each.

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