Evaluating Quantitative Research

I need an explanation for this Nursing question to help me study.

Answer the following the questions

1. Provide examples of experimental and non-experimental research design. Contrast the levels of control applied to each.

2. Describe sampling theory and provide examples to illustrate your definition. Discuss generalizability as it applies to nursing research.

3. 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.

4. Describe the “levels of evidence” and provide an example of the type of practice change that could result from each.

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