The table shows a small data set that has a pattern somewhat like that in Figure 3.22 in Example 14. As in that example, education is measured as the percentage of adult residents who have at least a high school degree. Using software,
a. Construct a data file, with columns for education, crime rate, and a rural/urban label.
b. Construct a scatter plot between y = crime rate and x = education, labeling each point as rural or urban.
c. Find the overall correlation between crime rate and education for all eight data points. Interpret.
d. Find the correlation between crime rate and education for the (i) urban counties alone and (ii) rural counties alone. Why are these correlations so different from the correlation in part c?

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