The dataset US States includes information on the percent of the population to graduate from college (of those age 25 and older) for each US state. Figure A.7 shows side-by-side boxplots for percent of college graduates by region of the country (Midwest, Northeast, South, and West.)

Figure A.7

(a) What are the variables and is each categorical or quantitative?

(b) Describe the results seen in the graph. Which region has the highest percent of college graduates? Which has the lowest? Are there any outliers and, if so, where?

(c) Does there appear to be an association between these two variables?

(d) Can we conclude that there is causation between the two variables: that one of the variables is causing changes in the other?

Transcribed Image Text:

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