Question 1

Which sampling method involves dividing the population into groups based on a shared characteristic and then randomly selecting members from each group?

Accepted Answer

Stratified sample

Question 2

A researcher selects every 5th person from a list of hospital patients to participate in a survey. Which sampling method is being used?

Accepted Answer

Systematic sample

Question 3

Which of the following best describes a convenience sample?

Accepted Answer

Selecting individuals who are easiest to reach

Question 4

In which sampling method are entire groups randomly selected, and all members of those groups are included in the sample?

Accepted Answer

Cluster sample

Question 5

A university wants to survey students about campus safety. They divide students by year (freshman, sophomore, junior, senior) and randomly select 50 students from each year. What sampling method is this?

Accepted Answer

Stratified sample

Question 6

Which sampling method is most likely to introduce bias due to lack of randomness?

Accepted Answer

Convenience sample

Question 7

If a researcher randomly selects 3 classrooms in a school and surveys every student in those classrooms, which sampling method is being used?

Accepted Answer

Cluster sample

Question 8

Which sampling method ensures that all individuals in the population have an equal chance of being selected?

Accepted Answer

Simple random sample

Question 9

A company wants to survey its employees. They list all employees and use a random number generator to select 100 employees. Which sampling method is this?

Accepted Answer

Simple random sample

Question 10

Which of the following is a key difference between stratified and cluster sampling?

Accepted Answer

Stratified sampling divides the population into groups and samples from each, while cluster sampling selects entire groups.

Question 11

A researcher stands outside a grocery store and surveys the first 20 people who exit. Which sampling method is this?

Accepted Answer

Convenience sample

Question 12

Which sampling method is most appropriate when the population is naturally divided into similar groups and it is cost-effective to sample entire groups?

Accepted Answer

Cluster sample

Question 13

If a population is divided into subgroups based on gender and then a random sample is taken from each subgroup, which sampling method is being used?

Accepted Answer

Stratified sample

Question 14

Which sampling method could result in overrepresentation of a particular group if the groups are not homogeneous?

Accepted Answer

Cluster sample

Question 15

A researcher wants to ensure that all age groups are represented in a health survey. Which sampling method should they use?

Accepted Answer

Stratified sample

Sampling Methods in Introductory Statistics

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