Learning Exercise 3: Sampling Review the lecture materials for this week and ans

Question

Learning Exercise 3: Sampling Review the lecture materials for this week and answering the following questions on sampling 1.) Discuss the differences between a population, a study population, a sampling unit, and a sampling frame 2.) Apply the following sampling issues and concepts to this article Clem, J.M.. Smith, ?.?., & Richards, K.V. (2012). Effects of a low-element challenge course on abstinence self-efficacy and group cohesion. Research on Social Work Practice, 22, 151-158 a.) Describe briefly the population and study population that the study described b.) What was the sampling frame used in the selection of the sample? Why? c.) Describe the type of sampling design used (i.e., the procedure the researchers used to sample their participants), and explain why it was used. Also discuss any advantages and/or disadvantages this design yielded (i.e., Did the researchers sample according to best practices? What were the limitations?) d.) Determine the extent to which the generalizations made are appropriate for the sample used. (i.e., Based on how the researchers sampled, did they follow procedures well enough to ensure their findings could be applied to the larger population? The key here is random sampling.)

Explanation / Answer

Population: In statistics , population is a collection of observations having common features.

A Study Population :  A study population is part of the general population which is extracted from the population for statistical analysis. In other words, study population is a subset of population.

A sampling unit: A part of the sample is known to be a sample unit . For example , if we want to study a sample of products produced in a factory , then a single product from the lot is a sample unit .

A sampling frame: A sampling frame is the source of the sample , from where it is drawn .

Hence sample unit is a subset of sampling frame.

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