In this study, national trends in mortality were used by examining 37 years of metropolitan-nonmetropolitan mortality patterns as part of a larger study investigating healthful and unhealthful places in the United States. Review the questions to ask when critiquing a research study. Answer the following questions. 

1. What were the major reasons the investigators chose this method to study this case rather than another study design?

2. In choosing controls for this study, what population should they ideally represent?

3. What conclusions did the investigators reach with regards to the emergence of the nonmetropolitan mortality penalty?

4. Calculate the crude mortality rate for the Metropolitan mortalities for years 2001-2004.

Present all your work in a 3-page Word document. Be sure to use APA format within the paper and references.