Abrasion loss of rubber specimens
Use this diagram to explain how the plotting symbol can represent a third numerical variable in a scatterplot. Use the pop-up menu to select different representations.
In this example, abrasion loss is the response variable. What combinations of tensile strength and hardness correspond to high abrasion loss?
Mention that it is often hard to interpret this kind of diagram.
In an industrial experiment, 30 rubber specimens were rubbed by an abrasive material. The measurements from each specimen were ...