Example: Suppose we are interested in the association between age and level of college education among adult Americans.

Example: Suppose we are interested in the association between age and level of college education among adult Americans. The following table represents the percentage of adults in dierent age categories with 4 years of a college education, among 151,316 sampled adults. Also shown is a bar chart which graphically represents these data. What can we say from these data? Now consider the following table representing the relationship between age and educational attainment. This relationship can be represented in what is known as a segmented bar chart, as shown below. How should we interpret this graph? What does this say about the association between educational attainment and age?