Sample Quality Article Example | Topics and Well Written Essays - 500 words

Sample Quality - Article Example It lowers the cost of carrying out a research, enables faster collection of data, improves the quality of the data, and ensures homogeneity and accuracy of results. This paper will analyze sample quality in the listed articles. In doing this, paper will seek to define the population in each case and quote the sampling method used. It will also explain the choice of the sample and state who participated in the study. It will equally seek to qualify the research to other populations. In deducing, the sampling method used, it will be necessary to define the various sampling methods that we have. Random sampling involves the random selection of sample from the population. In cluster sampling, selection of samples is in clusters close to each other like households in the same estate. Quota sampling involves selection of samples nonrandom according to a fixed quota. Snowball sampling involves the identifying of samples that meet the criteria for inclusion in a study. Purposive sampling involves sampling with a  purpose  in mind.  Availability sampling involves using just the available samples (Trochim Web). In the article by Scott et.al, the population was all Canadian elderly patients with anxiety disorders and clinically significant anxiety symptoms. Quota sampling method selected a sample of 36,984 adults aged 55 years and above who participated in the Canadian Community Health Survey in 2008. The selection of the people in the sample was because they suitably represented the target population.  The actual participants in the study were 12,792 individuals, living in Canada (Scott et.al 792). The researchers cannot generalize it to other populations because the analysis focused on adults aged 55 years and above which are usually the minority in any society. In the Yang et.al study, population was all adolescents 6 months after the 2008 Wenchuan earthquake in China. Quota sampling selected a sample of 2,463 middle schools and grade 10 students. Their selection was