Question 4.32

image 4.32 Multistage sampling. An article in the journal Science looks at differences in attitudes toward genetically modified foods between Europe and the United States. This calls for sample surveys. The European survey chose a sample of 1000 adults in each of 17 European countries. Here’s part of the description: “The Eurobarometer survey is a multistage, random-probability face-to-face sample survey.”

  1. (a) What does “multistage” mean?

  2. (b) You can see that the first stage was stratified. What were the strata?

  3. (c) What does “random-probability sample” mean?