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.
(i) Explain how a quota sample might be carried out in this context.
(ii) Explain a disadvantage of quota sampling in the context of your answer to part (i).
(iii) 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.
2011 Singapore General Certificate of Education Advanced Level (Higher 2), Mathematics (9740/02), Question 6.