This table summarizes results of a survey of the purchasing habits of 1,800 13- to 25-year-olds in the United States in 2006, a much sought-after group of consumers.8 Each row of the table indicates the percentage of participants in the survey who say the following:

(a) Would it be appropriate to summarize these percentages in a single pie chart?
(b) What type of chart would you recommend for these four percentages?

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Participants Say That They consider a companys social Percentage ... 69 commitment when deciding where to shop. Given equal price and quality, they 89 are likely to switch brands to support a cause. They are more likely to pay attention 74 to messages from companies deeply committed to a cause. They consider a company's social commitment when recommending products to friends.