Probability Sampling

What does simple random sampling ensure in probability sampling?

• Equal probability of selection for all items

• Selection based on a fixed interval

• Selection from different strata

• Selection based on convenience

Which sampling method involves selecting every nth item from a list?

• Cluster sampling

• Stratified sampling

• Systematic sampling

• Simple random sampling

Stratified sampling is best used when:

• The population is homogeneous

• The population can be distinctly divided into heterogeneous groups

• The sample size is very small

• All members are available for sampling

Cluster sampling is particularly useful when:

• The population is large and spread over a wide area

• Data needs to be collected quickly

• Detailed accuracy is not critical

• All of the above

What is the primary characteristic of probability sampling?

• It includes bias towards certain groups

• It allows researchers to make generalizations from the sample to the population

• It does not require random selection

• It uses a convenience sample

Which is not a type of probability sampling?

• Convenience sampling

• Simple random sampling

• Systematic sampling

• Stratified sampling

The ideal scenario for using simple random sampling is when:

• Population size is unknown

• You have a complete list of the population

• The population is divided into subgroups

• Sampling frame is unavailable

Systematic sampling risks what kind of error if the list has a hidden pattern?

• Random error

• Sampling bias

• Non-sampling error

• None of the above

Which sampling method involves dividing the population into strata and then randomly sampling from each stratum?

• Cluster sampling

• Stratified sampling

• Systematic sampling

• Simple random sampling

Cluster sampling differs from stratified sampling because it:

• Involves dividing the population into strata

• Selects whole groups or clusters at random

• Ensures each subgroup is represented proportionally

• Requires a list of all population members