National Firearms Survey. In the journal Injury Prevention (Jan. 2007), researchers from t...

National Firearms Survey. In the journal Injury Prevention (Jan. 2007), researchers from the Harvard School of Public Health reported on the size and composition of privately held firearm stock in the United States. In a representative household telephone survey of 2,770 adults, 26% reported that they owned at least one gun. The accompanying graphic summarizes the types of firearms owned.

a. What type of graph is shown?

Source: Hepburn, M., Miller, D. A., and Hemenway, D. “The US gun stock: Results from the 2004 national firearms survey,” Injury Prevention, Vol. 13, No. 1, Jan. 2007 (Figure 1).

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b. Identify the qualitative variable described in the graph.

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c. From the graph, identify the most common type of firearms.

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d. Convert the graph into a Pareto diagram. Interpret the results.