VIEW 7. What is sampling? Explain the differences between probabil- ity and nonprobability samples and identify the various types of each Distinguish among surveys, experiments, and observational methods of primary data collection. Cite examples of each method. 8. Define and give an example of each of the methods of gather- ing survey data. Under what circumstances should researchers choose a specific approach? Describe the experimental method of collecting primary data and indicate when researchers should use it. 9. 10