ABSTRACT
A major automobile manufacturer ran a full-page advertisement claiming that five years after being manufactured, a larger percentage of its pickups were still on the road-when compared with its two major competitors. This certainly should be of interest to consumers. However, while the differences were quite small, the advertisement contained a graph that magnified them. The graph was similar to the one shown
in Figure 1 in which the differences look pretty impressive until you consider that the bars start at a base of90% and go up to only 93%, as indicated in Figure 2.
