Sampling Methods and Their Characteristics

The video tutorial by Aisha on Educational Hub explains the concept of sampling in research. It covers the importance of selecting a representative sample to draw valid conclusions. The video distinguishes between probability sampling, which involves random selection, and non-probability sampling, which is based on non-random criteria. Various methods under each category are discussed, such as simple random sampling, systematic sampling, stratified sampling, and cluster sampling for probability sampling, and convenience sampling, voluntary response sampling, purpose of sampling, and snowball sampling for non-probability sampling. The video concludes with a comparison of the two sampling methods, highlighting their differences and applications.

Why is it often impractical to collect data from an entire population?

• It is too easy.

• It is unnecessary.

• It is always inaccurate.

• It is too time-consuming.

What is the main characteristic of probability sampling?

• Every member has a known chance of being selected.

• It involves non-random selection.

• It is always biased.

• It is based on convenience.

Which method involves dividing the population into subgroups and selecting entire subgroups randomly?

• Stratified sampling

• Systematic sampling

• Cluster sampling

• Simple random sampling

What is a key feature of non-probability sampling?

• It is always unbiased.

• It is more expensive.

• It uses random selection.

• It is based on non-random criteria.

Which sampling method involves participants volunteering themselves?

• Snowball sampling

• Purposive sampling

• Voluntary response sampling

• Convenience sampling

How does probability sampling differ from non-probability sampling in terms of bias?

• Probability sampling is free from bias.

• Non-probability sampling is less biased.

• Probability sampling is more biased.

• Both are equally biased.

In which type of sampling is the selection probability zero?

• Both types

• Neither type

• Probability sampling

• Non-probability sampling

Which sampling method is used when the research is exploratory?

• Probability sampling

• Neither type

• Non-probability sampling

• Both types

What is the basis of selection in probability sampling?

• Expert judgment

• Arbitrary choice

• Random selection

• Convenience

What assumption does non-probability sampling rely on?

• It is always cost-effective.

• Characteristics are evenly distributed.

• Every member has an equal chance.

• It is always time-consuming.