278ae74b42c518ae4f694fd0dca81705_464216e389ea47ff9bbc0e62dadf9c20.docx

278ae74b42c518ae4f694fd0dca81705_464216e389ea47ff9bbc0e62dadf9c20.docx

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Stat 1350 - Elementary Statistics Graded Homework Assignment 5 Chapters 10 and 11 Chapter 10 10.5 Marital status. In the U.S. Census Bureau document America’s Families and Living Arrangements: 2011, we find these data on the marital status of American women aged 15 years and older as of 2011: (a) How many women were not divorced in 2009? (b) Make a bar graph to show the distribution of marital status. (c) Would it also be correct to use a pie chart? Explain. 10.7 We sell CDs. Who sold the most CDs on the Web just before listeners began to download their favorites rather than buy CDs? Figure 10.13 graphs the shares of the market leaders in 1997 and says what percentage of all online sales they had. Does the graph fairly represent the data? Explain your answer. Figure 10.13 Percentage of market share for the three leading online sellers of compact discs in 1997, for Exercise 10.7 . (Data from Jupiter Communications.) 10.8 Murder weapons. The 2010 Statistical Abstract of the United States reports FBI data on murders for 2007. In that year, 49.6% of all murders were committed with handguns, 18.4% with other firearms, 12.1% with knives or other cutting implements, 5.8% with a part of the body (usually the hands, fists, or feet), and 4.4% with blunt objects. Make a graph to display these data. Do you need an “other methods” category? Why?
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10.9 The cost of imported oranges. Figure 10.14 is a line graph of the average cost of imported oranges each month from July 1995 to April 2012. These data are the price in U.S. dollars per metric ton. Figure 10.14 The price of oranges, July 1995 to April 2012, for Exercise 10.9 . (This figure was created using the Minitab software package.) (a) The graph shows strong seasonal variation . How is this visible in the graph? Why would you expect the price of oranges to show seasonal variation? (b) What is the overall trend in orange prices during this period, after we take account of the seasonal variation? 10.10 College freshmen. A survey of college freshmen in 2007 asked what field they planned to study. The results: 12.8%, arts and humanities; 17.7%, business; 9.2%, education; 19.3%, engineering, biological sciences, or physical sciences; 14.5%, professional; and 11.1%, social science. (a) What percentage of college freshmen plan to study fields other than those listed? (b) Make a graph that compares the percentages of college freshmen planning to study various fields.
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10.14 A bad graph? Figure 10.16 shows a graph that appeared in the Lexington (Ky.) Herald-Leader on October 5, 1975. Discuss the correctness of this graph.
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