46 Chapter 2 Graphical Summaries of Data 22. World population: Following are the populations of the continents of the world (not including Antarctica) in the year 2000. Continent Population (in millions) Africa 800 Asia 3676 Oceania 31 Europe 731 North America 485 South America 348 Source: U.S. Census Bureau a. Construct a frequency bar graph. b. Construct a relative frequency distribution. c. Construct a relative frequency bar graph. d. Construct a relative frequency Pareto chart. e. Construct a pie chart. f. True or false: In the year 2000, more than half of the people in the world lived in Asia. g. True or false: In the year 2000, there were more people in Europe than in North and South America combined. 23. Ages of video gamers: The Nielsen Company estimated the numbers of people in various gender and age categories who used a video game console. The results are presented in the following frequency distribution. Gender and Age Group Frequency (in millions) Males 2–11 13.0 Females 2–11 10.1 Males 12–17 9.6 Females 12–17 6.2 Males 18–34 16.1 Females 18–34 11.6 Males 35–49 10.4 Females 35–49 9.3 Males 50+ 3.5 Females 50+ 3.9 Source: The Nielsen Company a. Construct a frequency bar graph. b. Construct a relative frequency distribution. c. Construct a relative frequency bar graph. d. Construct a pie chart. e. True or false: More than half of video gamers are male. f. True or false: More than 40% of video gamers are female. g. What proportion of video gamers are 35 or over? 24. How secure is your job? In a survey, employed adults were asked how likely they thought it was that they would lose their jobs within the next year. The results are presented in the following frequency distribution. Response Frequency Very likely 741 Fairly likely 859 Not too likely 3789 Not likely 9773 Source: General Social Survey a. Construct a frequency bar graph. b. Construct a relative frequency distribution. c. Construct a relative frequency bar graph. d. Construct a pie chart. e. True or false: More than half of the people surveyed said that it was not likely that they would lose their job. f. What proportion of the people in the survey said that it was very likely or fairly likely that they would lose their job? 25. Back up your data: In a survey commissioned by the Maxtor Corporation, U.S. computer users were asked how often they backed up their computer’s hard drive. The following frequency distribution presents the results. Response Frequency More than once per month 338 Once every 1–3 months 424 Once every 4–6 months 212 Once every 7–11 months 127 Once per year or less 311 Never 620 Source: The Maxtor Corporation a. Construct a frequency bar graph. b. Construct a relative frequency distribution. c. Construct a relative frequency bar graph. d. Construct a pie chart. e. True or false: More than 30% of the survey respondents never back up their data. f. True or false: Less than 50% of the survey respondents back up their data more than once per year. 26. Education levels: The following frequency distribution categorizes U.S. adults aged 18 and over by educational attainment in the year 2007. Educational Attainment Frequency (in thousands) None 870 1–4 years 2,100 5–6 years 3,774 7–8 years 5,244 9 years 4,329 10 years 5,588 11 years 11,833 High school graduate 70,108 Some college but no degree 42,349 Associate’s degree (occupational) 9,597 Associate’s degree (academic) 8,641 Bachelor’s degree 39,824 Master’s degree 13,756 Professional degree 3,113 Doctoral degree 2,496 Source: U.S. Census Bureau a. Construct a frequency bar graph. b. Construct a relative frequency distribution. c. Construct a relative frequency bar graph. d. Construct a frequency distribution with the following categories: 8 years or less, 9–11 years, High school graduate, Some college but no degree, College degree (Associate’s or Bachelor’s), Graduate degree (Master’s, Professional, or Doctoral). e. Construct a pie chart for the frequency distribution in part (d). f. What proportion of people did not graduate from high school?
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