1. Identify the difference between a sample and a population and how a representative sample is related to generalizability in research.
2. Define the key to probability sampling methods and the different types of probability sampling strategies.
3. Explain when nonprobability sampling methods may be preferred along with the different types of nonprobability sampling.
4. Highlight the factors that can affect the generalizability of results from a sample, including probability samples.
5. Describe the concept of sampling error and explain how its size is affected by the heterogeneity of the population and the fraction of population included in the sample.