N2011 P2 Q6
N2011 P2 Q6
Junior College 2
5 marks
It is desired to interview residents of a city suburb about the types of shop to be opened in a new shopping mall. In particular it is necessary to interview a representative range of ages.
- Explain how a quota sample might be carried out in this context.[2]
- Explain a disadvantage of quota sampling in the context of your answer to part (i).[1]
- State the name of a method of sampling that would not have this disadvantage, and explain whether it would be realistic to use this method in this context.[2]
Solution:
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Answer:(i) Proportional age quotas. (ii) Non-random selection within groups may bias preferences. (iii) Stratified random sampling; may be impractical without a complete age-based sampling frame.
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