Concept explainers
(a)
To explain are they using a simple random sample.
(a)
Answer to Problem 1E
No, they are not using.
Explanation of Solution
It is given in the question that GFK Roper conducts a global consumer survey to help multinational companies and understand different consumer attitudes throughout the world. Thus, as we see the sample design in the question, we can say that they are not using a simple random sample because they want exactly
(b)
To find out what kind of design do you think they are using.
(b)
Answer to Problem 1E
They are using stratified sample design.
Explanation of Solution
It is given in the question that GFK Roper conducts a global consumer survey to help multinational companies and understand different consumer attitudes throughout the world. Thus, by looking at the design of the design they conducted to do the survey we can say that they are using stratified sample design because there are dealing with the two strata that are males and females.
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