1.22 Figure EX-1.22 is a graph similar to one that appeared in USA Today (June 29, 2009). This graph is meant to be a bar graph of responses to the question shown in the graph.

a. Is response to the question a categorical or numerical variable?

b. Explain why a bar chart rather than a dotplot was used to display the response data.

c. There must have been an error made in constructing this graph. How can you tell that the graph is not a correct representation of the response data?