18 Questions
What method of sampling is used when obtaining a list of all seventh graders and collecting data from a subset of schools?
Cluster sampling
What is an advantage of cluster sampling over other methods for obtaining information?
Cost-effectiveness for selecting subjects based on proximity
In cluster sampling, what is a disadvantage related to selecting between many small clusters or few large clusters?
Economic efficiency with low variability control
What type of sampling involves selecting subjects based on convenient accessibility and proximity to the researcher?
Convenient sampling
What is a disadvantage of using convenient sampling as a method of data collection?
Unrepresentative sample
Which type of sampling ensures some degree of representativeness by selecting people according to certain fixed quotas?
Quota sampling
What is the main advantage of using a stratified random sample over a simple random sample?
All of the above
What is the main disadvantage of using a stratified random sample?
All of the above
In a stratified random sample, how are the population elements separated into groups?
Into non-overlapping groups (strata)
Which of the following is a type of probability sampling method?
All of the above
What is the key characteristic of a systematic random sample?
The sample is selected according to a random starting point but with a fixed, periodic interval (k)
Which of the following is a potential disadvantage of a systematic random sample?
All of the above
What is a stratified random sample?
A sample in which each sampling unit is a collection of elements
Why may stratified random sampling produce a smaller bound on the error of estimation compared to simple random sampling (SRS)?
Because measurements within strata are homogeneous
What is one disadvantage of stratified random sampling compared to simple random sampling (SRS)?
It requires greater effort and complexity
What is a clustered random sample?
A sample where each cluster is a collection of elements
How are clusters selected in a clustered random sample?
By listing all clusters and forming a frame
What can be an example of a cluster in clustered random sampling?
Zip codes
Learn about the advantages of using a stratified random sample in probability sampling. Understand how this method can produce smaller bounds on the error of estimation, reduce costs, and ensure representation of specific groups within a population.
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