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Then use simple random sampling to choose proportionate numbers from the first department and do the same for each of the remaining departments . Those numbers picked from the first department , picked from the second department , and so on represent the members who make up the stratified sample . To choose a cluster sample , divide the population into clusters -LRB- groups -RRB- and then randomly select some of the clusters . All the members from these clusters are in the cluster sample . For example , if you randomly sample four departments from your college population , the four departments make up the cluster sample .
Please check all the words that can be used instead of the target word in the same context. Note that the morphology of the target (third person singular, past tense etc.) is considered to be applied to the candidate automatically in the process of paraphrasing.