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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:
Smoking
Status
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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