Page 94 - Demo

54 Chapter 1 %u2022 Analyzing One-Variable DataBuilding Concepts and Skills 1. True/False: Dotplots, stemplots, and histograms show every individual value in a set of quantitative data. 2. The first step in making a histogram is to choose intervals that span the data. intervals is a good minimum. 3. True/False: In a histogram, you should leave no gaps between adjacent bars. 4. In this book, if you see a histogram with bars above the intervals from 0%u22125 and from 5%u201310 on a number line, in which of the two bars is a data value of 5 included? 5. True/False: The shape of the distribution shown in a histogram will be the same no matter what widths you choose for your intervals. 6. When comparing distributions of quantitative data with histograms, should you scale the vertical axis using frequencies or relative frequencies? Mastering Concepts and Skills 7. Measuring carbon dioxide Burning fuels in power plants and motor vehicles emits carbon dioxide ( CO2 ), which may contribute to climate change. The%u00a0following table displays CO2 emissions in metric tons per person from 48 countries with populations of at least 20 million in a recent year. 55 Make a histogram of the data using intervals of width 2, starting at 0.Country CO2 Country CO2 Country CO2 Algeria 4.0 Italy 5.6 South Africa 8.2 Argentina 4.0 Japan 8.7 Spain 5.4 Australia 16.3 Kenya 0.3 Sudan 0.5 Country CO2 Country CO2 Country CO2 Bangladesh 0.6 Korea, North 1.5 Tanzania 0.2 Brazil 2.2 Korea, South 11.9 Thailand 4.1 Canada 15.4 Malaysia 7.8 Turkey 4.9 China 7.1 Mexico 3.4 Ukraine 5.1 Colombia 2.0 Morocco 2.0 United Kingdom 5.5 Congo 0.6 Myanmar 0.5 United States 16.1 Egypt 2.5 Nepal 0.5 Uzbekistan 3.3 Ethiopia 0.2 Nigeria 0.7 Venezuela 4.1 France 5.0 Pakistan 1.2 Vietnam 2.6 Germany 8.4 Peru 1.7 Ghana 0.5 Philippines 1.3 India 1.9 Poland 8.5 Indonesia 2.3 Romania 3.9 Iran 9.4 Russia 11.5 Iraq 5.6 Saudi Arabia 17.0 8. Off to work I go How long do people travel each day to get to work? The following table gives the average travel times to work (in minutes) in a recent year for workers in each state and the District of Columbia who are at least 16 years old and don%u2019t work at home. 56 Make a histogram of the travel times using intervals of width 2 minutes, starting at 16 minutes.State Travel time to work (min) State Travel time to work (min) State Travel time to work (min) AL 24.9 LA 25.7 OK 21.9 AK 19.1 ME 24.2 OR 23.9 pg 46 Exercises Lesson 1.5 W H AT D I D Y O U L E A R N ? LEARNING TARGET EXAMPLE EXERCISES Make histograms of quantitative data. p. 46 7%u201310 Describe histograms of quantitative data. p. 50 11%u201314 Compare distributions of quantitative data with histograms. p. 51 15%u201318 %u00a9 Bedford, Freeman & Worth Publishers. For review purposes only. Do not distribute.