Rising health care costs are of major concern to Americans. A nationwide survey of 2,119 U.S. adults was conducted to elicit opinions on who is to blame for the rising costs (The Harris Poll, Oct. 28, 2008). The next table summarizes the responses to the question "When you think of the rising costs of health care, who do you think is most responsible?"

a. Compute the relative frequencies in each response category.
b. Construct a relative frequency bar graph for the data.
c. Convert the relative frequency bar graph into a Pareto diagram. Interpret the graph.

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Most Responsible for Rising Health Care Costs Number Responding Insurance companies Pharmaceutical companies Government Hospitals Physicians Other Not at all sure 869 339 338 127 85 128 233 Total 2.119