48 Chapter 2 Graphical Summaries of Data Answers to Check Your Understanding Exercises for Section 2.1 (continued) 2. a. 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 Frequency (100,000s) Cross-over truck Pickup truck SUV Minivan Luxury car Large car Midsize car Small car b. Type of Relative Vehicle Frequency Frequency Small car 334,053 0.239 Midsize car 338,328 0.242 Large car 12,920 0.009 Luxury car 109,961 0.079 Minivan 85,157 0.061 SUV 124,507 0.089 Pickup truck 174,523 0.125 Cross-over truck 217,516 0.156 c. 0 0.05 0.10 0.15 0.20 0.25 Relative Frequency Cross-over truck Pickup truck SUV Minivan Luxury car Large car Midsize car Small car d. Sales of Cars and Trucks Small car 23.9% Midsize car 24.2% Large car 0.9% Cross-over truck Luxury car 7.9% SUV 8.9% Minivan 6.1% Pickup truck 12.5% 15.6% 3. a. Somalia b. Yes, the height of the bar for Cuba is greater than the heights of the bars for Haiti and Iran put together. c. 6500 d. 2000 4. a. Less b. 72% c. True SECTION 2.2 Frequency Distributions and Their Graphs Objectives 1. Construct frequency distributions for quantitative data 2. Construct histograms 3. Determine the shape of a distribution from a histogram Objective 1 Construct frequency distributions for quantitative data Frequency Distributions for Quantitative Data How much air pollution is caused by motor vehicles? This question was addressed in a study by Dr. Janet Yanowitz at the Colorado School of Mines. She studied the emissions of particulate matter, a form of pollution consisting of tiny particles, that has been associated with respiratory disease. The emissions for 65 vehicles, in units of grams of particles per gallon of fuel, are presented in Table 2.7. Table 2.7 Particulate Emissions for 65 Vehicles 1.50 0.87 1.12 1.25 3.46 1.11 1.12 0.88 1.29 0.94 0.64 1.31 2.49 1.48 1.06 1.11 2.15 0.86 1.81 1.47 1.24 1.63 2.14 6.64 4.04 2.48 1.40 1.37 1.81 1.14 1.63 3.67 0.55 2.67 2.63 3.03 1.23 1.04 1.63 3.12 2.37 2.12 2.68 1.17 3.34 3.79 1.28 2.10 6.55 1.18 3.06 0.48 0.25 0.53 3.36 3.47 2.74 1.88 5.94 4.24 3.52 3.59 3.10 3.33 4.58
navidi_monk_essential_statistics_1e_ch1_3
To see the actual publication please follow the link above