Copyright © 2011 Pearson Education, Inc. Statistical Reasoning

Copyright © 2011 Pearson Education, Inc. Slide 5-3 Unit 5D Graphics in the Media

5-D Copyright © 2011 Pearson Education, Inc. Slide 5-4 A multiple bar graph has two or more sets of bars that allow comparison between two or more data sets. All the data sets must involve the same categories so that they can be displayed on the same graph. A stack plot shows different data sets in a vertical stack. Stack plots usually use either stacked bars or stacked line graphs. Graphics Beyond the Basics

5-D Copyright © 2011 Pearson Education, Inc. Slide 5-5 The following multiple bar graph shows how education affects personal employment. A Multiple Bar Graph

5-D Copyright © 2011 Pearson Education, Inc. Slide 5-6 The following stack plot shows trends in death rates from four diseases. A Stack Plot

5-D Copyright © 2011 Pearson Education, Inc. Slide 5-7 What was the death rate for tuberculosis in 1930? About 220 – 100 = 120 deaths per 100,000 Reading a Stack Plot

5-D Copyright © 2011 Pearson Education, Inc. Slide 5-8 Perceptual distortions: Many graphics are drawn in a way that distorts our perception of them. Watch the scales: It can be visually deceptive if you do not study the scales carefully. Percentage change graphs: Graphs that show percentage change can be misleading unless you interpret them with great care. Pictographs: Pictographs are graphs embellished with additional artwork. The artwork may make the graph more appealing, but can also mislead. A Few Cautions about Graphics

5-D Copyright © 2011 Pearson Education, Inc. Slide 5-9 The lengths of the dollars to the right represent the data, but your eyes tend to focus on the area. Perceptual Distortion

5-D Copyright © 2011 Pearson Education, Inc. Slide 5-10 Both graphs show the same data, but they look very different because their vertical scales have different ranges. Different Vertical Scales

5-D Copyright © 2011 Pearson Education, Inc. Slide 5-11 It appears that the world population has been rising linearly. However, the time intervals on the horizontal axis are not uniform in size. Different Horizontal Scales

5-D Assignment P , 17-19, 21, 23, 26, 30, 31 Copyright © 2011 Pearson Education, Inc. Slide 5-12