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This example focuses on visualizing statistical data related to health care spending among individuals under the age of 25, showcasing trends over five years. It employs double bar graphs to present production costs and gross income of a company, along with a survey comparing consumer purchase intentions versus actions from the previous year. Additionally, a pie chart illustrates the daily consumption of caffeinated beverages among American adults. This analysis emphasizes the importance of graphical representation in understanding and solving real-world problems.
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Statistical Graphs: A Problem-Solving ToolSection 12.5
Example The following data show the average amount of money spent on health care by persons under age 25: 1 425 2 445 3 551 4 504 5 530 Graph the data using 1–5 as the years and 400–600 as the amounts of $50 intervals.
Graph Average Amount of Money Spent on Health Care by Persons Under 25 Amount (dollars) Year
Example • The double bar graph shows the production costs and gross income (in thousands) for a company. Approximate the percent of gross income that goes to production costs for each year.
Solution For 1998: For 1999: For 2000:
Example • A recent survey of households showed that more people planned to make major purchases this year. The following table gives the results of the survey. Use side-by-side vertical bar graphs comparing the percent of consumers planning to buy each of the items with the percent who bought each item last year.
Solution Bought Last Year Total = 2407 Plan to Buy this Year Total = 2684
Example Construct a pie chart depicting the percentage of American adults interviewed who drink caffeinated beverages on a daily basis. • 1-2 cups per day 34 • 3-4 cups per day 15 • 5-6 cups per day 10 • 7+ cups per day 8 • None 27 Total: 94
Graph END
