Expand Your Knowledge Donut Pie Charts The book The Wall Street Journal. Guide to Information Graphics by Dona M. Wong gives strategies for using graphs and charts to display information effectively. One popular graph discussed is the donut pie chart. The donut pie chart is simply a pie chart with the center removed. A recent Harris Poll asked adults about their opinions regarding whether books should be banned from libraries because of social, language, violent, sexual, or religious content. The responses by education level to the question “Do you think that there are any books which should be banned completely?” are shown in the following donut pie charts.

(a) What feature of Keith’s graph makes it diffi cult to visually compare the responses of those with some college to those shown in the other graphs?
How would you change Keith’s graph for easier comparison?

(b) Interpretation Compare the two graphs made by Ramon. At which of the two education levels is the “no” response more frequent?
16 Technology: Cars The following cluster bar graph shows responses from different age groups to questions regarding connectivity and tracking technology found in new cars. A recent Harris Poll asked respondents how much they agreed or disagreed with statements that they (1) worry that the technologies cause too much distraction and are dangerous;
(2) worry about letting companies know too much about location and driving habits;
(3) worry that insurance rates could increase because of knowledge of driving habits;
(4) think the technologies make driving more enjoyable;
(5) feel safer with the technologies;
(6) feel it is important to stay connected when in vehicle.

The graph shows the percentage of respondents in each age category who agree strongly or somewhat agree to each of the six statements.

(a) Interpretation Which statement has the highest rate of agreement for all four age groups?

(b) Interpretation Which age group expresses least worry about insurance companies raising their rates because of the driving habit information collected by the technologies?

(c) Interpretation Which age group has the highest percentage of those who fi nd the technologies make driving more enjoyable?

(i) Graphs made by Ramon (a) High school or less (b) College graduate (ii) Graph made by Keith Some college Yes No Not at all sure Yes No Not at all sure Cengage Learning*