The student body president proposes that high school students be allowed to start school two hours later than elementary and middle school students. She believes that if high school students are more rested, they would have fewer absences from school. She is proposing a correlational study to examine this belief.

- Describe the predicted relationship between the variables of this study.
- Identify the population the student body president is studying.
- Provide an example of a valid operational definition of “rested.”
- Provide a specific example of how the “third variable problem” could affect this study.
- Explain why an experimental version of this study might not be ethical.
- Explain how circadian rhythm could affect the results of this study.