Stratified Sampling Quiz Form
Stratified Sampling Quiz Form
1. Which of the following best describes stratified sampling?
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Dividing a population into subgroups and sampling from each subgroup
Selecting every nth person from a population
Sampling only from one subgroup of a population
Choosing participants based on convenience
2. What is the main purpose of using stratified sampling?
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To ensure all subgroups are represented
To save time and money
To increase sampling error
To focus on the largest subgroup only
3. Suppose a population has 60% Group A and 40% Group B. If you want a sample of 100 using stratified sampling, how many should be from Group B?
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4. Which scenario is most appropriate for stratified sampling?
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A population with distinct subgroups of interest
A completely homogeneous population
When all subgroups are the same size
When only one subgroup is relevant
5. Briefly explain one advantage of stratified sampling.
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6. Indicate your agreement: "Stratified sampling reduces sampling bias compared to simple random sampling."
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Strongly Disagree
1
2
3
4
Strongly Agree
5
1 is Strongly Disagree, 5 is Strongly Agree
7. Which of the following is NOT a step in stratified sampling?
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Divide the population into strata
Randomly sample within each stratum
Combine samples from all strata
Ignore subgroup characteristics
8. A researcher divides a population by age group before sampling. What is each age group called?
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Stratum
Cluster
Quota
Cohort
9. Rate your confidence in your understanding of stratified sampling.
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1
2
3
4
5
10. For the following table, select the correct sample size from each stratum if the total sample size is 50.
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Rows
Sample Size
Stratum X (40%)
Stratum Y (30%)
Stratum Z (30%)
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