Data Collection

I’m studying for my Nursing class and don’t understand how to answer this. Can you help me study?

Select a quantitative research study.  Critically appraise the article using the following guidelines:

1. Were the recruitment and selection of study participants clearly described and appropriate?

2. Were the data collected in a consistent way?

3. Were the study controls maintained as indicated by the design?  Did the design include an intervention that was consistently implemented?

4. Did the researchers obtain data from an existing database?  If so, did the data obtained address the study purpose and objectives, questions, or hypotheses?  Were the reliability and validity of the database addressed in the research report?