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Doing Empirical Political Research
James M. Carlson, Providence College
Mark S. Hyde, Providence College
Web Exercises
Chapter 15: Graphing and Describing Linear Bivariate Relationships

Exercise 15.3: Interpreting a Correlation Coefficient

Answer the following questions in one or two sentences.

1. What does a Pearson correlation coefficient of 1.00 tell you about the relationship between two variables?





2. Which of the following Pearson correlation coefficients indicates the strongest relationship between two variables?

A. .57 B. -.84 C. .06 D. -.29


3. Look at Graph 15.2c. Do you think the Pearson correlation coefficient this scatterplot would be closer to one or to zero? Why?



4. Look at Graph 15.2b. Would the Pearson correlation coefficient for this scatterplot be positive or negative? Why?





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