ACCA考试F2基础历年真题精选及详细解析1109-20 Question：A company wishes to carry out a national survey of adults' reading habits. To reduce travelling costs, the country was divided 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 1 The correct answer is: C The sample is selected in stages, at first selecting not individuals but constituencies. Multi-stage sampling is the correct answer as this method involves dividing 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 divided further. Stratified sampling involves dividing 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. 1 本文来源：https://www.wddqw.com/doc/601c12f69dc3d5bbfd0a79563c1ec5da50e2d61b.html