Problem
Analyze the article "Trends and Patterns of Disparities in Cancer Mortality Among US Counties, 1980-2014" by Ali H. Mokdad, Laura Dwyer-Lindgren and Christina Fitzmaurice and compose a report. Focus on the methods section and give detailed answers to these 3 questions:
A. Did the methods used to analyze the data rest on assumptions that might not hold? What were the assumptions?
B. Were there issues with sampling?
C. What implications follow if the article's results are accepted?