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According to Topaz Enterprises, a Portland, Oregonbased airfare accounting firm, "more than 80% of all tickets purchased for domestic flights are discounted" (Travel Weekly, May 15, 1995). The results of the accounting firm's survey of domestic airline tickets are summarized in the table.
a. Give your opinion on whether the data described in the table are from a population or a sample. Explain your reasoning.
b. Display the data with a bar graph. Arrange the bars in order of height to form a Pareto diagram. Interpret the resulting graph.
c. Do the data support the conclusion reached by Topaz Enterprises regarding the percentage of tickets purchased that are discounted?
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