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.
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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?