1. What are the types of variables? 2. What is a case (or observation?) 3. How do I find a percent? 4. What is the difference between an observational study and an experiment? 5. What is the relationship between a sample and the population? 6. What is the difference between a population parameter and a statistic? 7. Why can we not make a causal statement from an observational study? 8. What does it mean for a study to be blind