Chapter 18 Problems AGid Statistical
Modeling: A Fresh Approach (2/e)
- Is the point of a controlled experiment to create variability or to avoid variability?
- What is an experimental variable? In what ways is it the same
and in what ways different from an explanatory variable?
- What is the purpose of randomization in conducting an experiment? What gets randomized?
- Why might blocking be preferred to randomization?
- What is the point of matched sampling and instrumental variables?