Question 1

Which sampling method is illustrated in the first image, where every third individual is selected from a line-up of people?

Accepted Answer

Systematic sampling

Question 2

In the second image, the population is divided into two groups based on gender, and then samples are taken from each group. Which sampling method does this represent?

Accepted Answer

Stratified sampling

Question 3

Which of the following best describes the main difference between stratified sampling and cluster sampling?

Accepted Answer

Stratified sampling divides the population into groups and samples from each group, while cluster sampling divides the population into groups and samples all members from selected groups.

Question 4

Suppose a researcher wants to study the opinions of university students about campus safety. She divides the students by year (freshman, sophomore, junior, senior) and randomly selects 50 students from each year. Which sampling method is she using?

Accepted Answer

Stratified sampling

Question 5

A company wants to survey its employees. It numbers all employees and selects every 10th employee on the list. What is this sampling method called?

Accepted Answer

Systematic sampling

Question 6

Which of the following is a key advantage of stratified sampling over simple random sampling?

Accepted Answer

It ensures representation from all subgroups within the population.

Question 7

If a researcher divides a city into neighborhoods, randomly selects five neighborhoods, and surveys every household in those neighborhoods, which sampling method is being used?

Accepted Answer

Cluster sampling

Question 8

Which of the following best describes systematic sampling?

Accepted Answer

Selecting every kth member from a list after a random start

Question 9

A researcher wants to study the dietary habits of high school students in a large city. She randomly selects 10 schools and surveys all students in those schools. What type of sampling is this?

Accepted Answer

Cluster sampling

Question 10

Which sampling method is most likely to produce a biased sample?

Accepted Answer

Convenience sampling

Introduction to Statistics: Key Concepts and Data Collection Methods

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