National Firearms Survey. In the journal Injury Prevention (January 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 own at least one gun. The accompanying graphic summarizes the types of firearms owned.
(a) What type of graph is shown?
(b) Identify the qualitative variable described in the graph.
(c) From the graph, identify the most common type of firearms.
