Chapter 1
Chapter 1 - Introduction to Data Learning Objectives Identify the type of variables (e.g. numerical or categorical; discrite or continuous; ordered or not ordered). Identify the relationship between multiple variables (i.e. indepedent vs. dependent). Define variables that are not associated as independent. Be able to describe and identify the difference between observational and experimental studies. Distinguish between simple random, stratified, and cluster sampling, and recognize the benefits and drawbacks of choosing one sampling scheme over another. »