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1. What is the correlation for the equation you found in problem 98?
2. What is extrapolation, and why shouldn’t we trust predictions using extrapolation?
3. What is interpolation?
4. What is a lurking variable?
5. Why should we avoid using averaged data for regression and correlation?
6. What is causation? Give an example.
7. What is common response? Give an example.
8. What is confounding? Give an example.
9. Why is a two-way table called a two-way table?
Use this table for questions 110–117:
Did not complete high school 82 19 113
Completed high school 97 25 103
1 to 3 years of college 92 49 59
4 or more years of college 86 63 37
10. Fill in the marginal distributions for this table.
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