We are going to enter into our least mathematical unit of the course: sampling and experimentation.  Read section 5.1 and be able to answer these questions:

What is the difference between an observational study and an experiment?

What is the difference between a population and a sample?

What does design bias mean?  What are some examples?

What is a simple random sample? A stratified random sample? Cluster sample? Quota sample? Systematic sample?