Question

Asked Dec 17, 2019

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In Exercise identify which of these types of sampling is used: random, systematic, convenience, stratified, cluster.

Acupuncture Study In a study of treatments for back pain, 641 subjects were randomly assigned to the four different treatment groups of individualized acupuncture, standardized acupuncture, simulated acupuncture, and usual care (based on data from “A Randomized Trial Comparing Acupuncture, Simulated Acupuncture, and Usual Care for Chronic Low Back Pain,” by Cherkin et al., Archives of Internal Medicine , Vol. 169, No. 9).

Step 1

*Simple random sampling:*

If a sample of *n* subjects is selected and every unit in the population has the equal chance of being selected into the considered sample, then it is termed as simple random sampling.

*Systematic sampling:*

Systematic sampling involves of first considering a starting point for selecting the sample and then selecting every unit in the population.

*Convenience sampling:*

The convenience sampling is taken by using the subjects that are easily available to be considered into the sample.

*Stratified s...*

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