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ACCA考试F2基础模拟题：Sources of data
Question：A company wishes to carry out a national survey of adults' reading habits. To reduce travelling costs, the country was pided into constituencies. A sample of 50 constituencies was selected at random. With each of these constituencies, 5 polling districts were selected, again using random techniques. Interviewers will visit a random selection of 30 people on the electoral register of each district selected.
What sampling method is the company using?
A.Stratified
B.Systematic
C.Multi-stage
D.Simple random
The correct answer is: C
The sample is selected in stages, at first selecting not inpiduals but constituencies.
Multi-stage sampling is the correct answer as this method involves piding the population into a number of sub-populations and then selecting a small sample of these sub-populations at random. Each sub-population is then pided further.
Stratified sampling involves piding the population into strata and then taking a random sample from each stratum.
Random sampling is where every member of the population has an equal chance of being selected and systematic where every nth item after a random start is selected.
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