High school seniors in a certain city are to be surveyed regarding their post-hi

Question

High school seniors in a certain city are to be surveyed regarding their post-high school plans. What would be a cluster sampling for this study? Obtain a list of all high schools in the city and choose 20 seniors at random from each of the high schools to include in the study. Obtain a list of all high schools in the city, choose four high schools at random, then survey all seniors at the four high schools. Obtain a list of all high school seniors in the city and choose 200 seniors at random to include in the study. Obtain lists of public and private high schools in the city, choose five public and five private high schools, then randomly select 20 seniors from each school to include in the study.

Explanation / Answer

Solution:- (d)

Cluster sampling refers to a type of sampling method . With cluster sampling, the researcher divides the population into separate groups, called clusters. Then, a simple random sample of clusters is selected from the population. The researcher conducts his analysis on data from the sampled clusters.

Compared to simple random sampling and stratified sampling , cluster sampling has advantages and disadvantages. For example, given equal sample sizes, cluster sampling usually provides less precision than either simple random sampling or stratified sampling. On the other hand, if travel costs between clusters are high, cluster sampling may be more cost-effective than the other methods.

So, as per the definition, in cluster study the researcher will Obtain lists of public and private high schools in the city, choose five public and five private high schools, then randomly select 20 seniors from each school to include in the study.
Hence, the forth option is correct.

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