Why did the researchers conduct this research? In other words, what did they hope to learn?
Describe the population of interest to the researchers. In other words, from what population did the researchers draw their sample?

What type of sampling technique did the researchers use?
What were the strengths and limitations of this sampling technique(s)?

Given the sampling technique used, were the researchers conclusions justified by the results?
If you were the researcher, what type of sampling technique would you have used?