The survey referenced in the previous exercise was conducted by Robert Half Technology. This company issued a press release ("Whistle-But Don't Tweet- While You Work," www.roberthalftechnology.com, October 6, 2009) that provided more detail than in the USA Today snapshot graph. The actual question asked was "Which of the following most closely describes your company's policy on visiting social networking sites, such as Facebook, MySpace and Twitter, while at work?" The responses are summarized in the following table:
a. Explain how the survey response categories and corresponding relative frequencies were used or modified to produce the graphical display in the previous exercise.
b. Using the original data in the table, construct a segmented bar graph.
c. What are two other types of graphical displays that would be appropriate for summarizing these data?