Understanding Sampling Methods

This video tutorial explores the concept of sampling in research, detailing both probability and non-probability sampling methods. It explains how to choose the right sampling method based on research aims and resources, and highlights the importance of aligning sampling choices with research objectives. The video also provides practical examples and discusses the limitations and trade-offs involved in sampling.

What is the primary goal of the video on sampling methods?

• To explain sampling and its methods for research

• To provide a detailed history of sampling

• To discuss the financial aspects of sampling

• To compare sampling with other research methods

In research, what is the term used for the larger group from which a sample is drawn?

• Sample

• Subset

• Control Group

• Population

Which sampling method involves selecting participants randomly from predefined subgroups?

• Convenience Sampling

• Simple Random Sampling

• Stratified Random Sampling

• Cluster Sampling

What is a key advantage of simple random sampling?

• It requires no prior knowledge of the population

• It is easy to implement and cost-effective

• It is always representative of minority subgroups

• It eliminates all forms of bias

How does cluster sampling differ from stratified random sampling?

• Cluster sampling involves selecting entire groups, while stratified sampling selects individuals from all groups

• Cluster sampling is more expensive than stratified sampling

• Cluster sampling is used only in qualitative research

• Cluster sampling requires more detailed population data

Which non-probability sampling method relies on the researcher's judgment to select participants?

• Purposive Sampling

• Snowball Sampling

• Convenience Sampling

• Random Sampling

What is a major drawback of convenience sampling?

• It is time-consuming

• It is unlikely to produce a representative sample

• It requires a large budget

• It is difficult to implement

In snowball sampling, how are additional participants typically recruited?

• Through online surveys

• By selecting every nth person

• By referrals from initial participants

• Through random selection

What should guide the choice of a sampling method in a research project?

• The researcher's personal preference

• The research aims and available resources

• The popularity of the method

• The ease of data collection

What is a common trade-off when selecting a sampling method?

• Balancing cost and time

• Balancing researcher bias and participant bias

• Balancing representativeness and practicality

• Balancing sample size and data quality