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:
Response Category Relative Frequency (expressed as percent)
Prohibited completely 54%
Permitted for business purposes only 19%
Permitted for limited personal use 16%
Permitted for any type of personal use 10%
Don’t know/no answer 1%

a. Explain how the survey response categories and corresponding relative frequencies were used or modified to produce the graphical display in Exercise 3.2.

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?