About Sampling Methods

The sampling method, also known as the sampling methodology, is the act of examining a population by acquiring data and evaluating it. It's the data's basis, and the sample space is huge.

There are a few different sampling procedures to choose from, and they may be classified into two categories. All of these sampling methods may include deliberately targeting hard-to-reach or difficult-to-reach populations.

Types of Sampling Method

There are a variety of sampling approaches accessible in statistics to obtain relevant data from a population. The following are the two types of sampling methods:

  • Probability Sampling
  • Non-probability Sampling

Probability Sampling

The probability sampling approach employs some form of random selection. Using this method, all of the eligible participants have an equal opportunity to choose a sample from the whole sample of candidates. The non-probability sampling method takes longer and makes it more expensive. Because it ensures that the sample will be representative of the population, probability sampling is a good method to use.

Types of Probability Sampling

  • Simple random sampling
  • Systematic sampling
  • Stratified sampling
  • Clustered sampling

Non-probability Sampling

In the non-probability sampling method, the sample is chosen by the researcher based on his or her own subjective assessment, rather than using a random selection technique. Because of the limitations of this method, not every person in the population can be included in the research.

Types of Non-probability Sampling

  • Convenience sampling
  • Consecutive sampling
  • Quota sampling
  • Purposive or Judgmental sampling
  • Snowball sampling

Following are some of the multiple choice questions on the Sampling Methods with answers that will help the students in developing their knowledge.

Sampling Methods MCQ

1. Identify the sampling design: A campaign intern makes phone calls to ask questions to registered voters regarding their intention to vote on election day.

  • cluster
  • volunteer
  • systematic
  • simple random

2. Marianne wanted to know students' opinion on the new schedule at school. So she randomly selected 2 students from each class during second period. This is a form of:

  • Convenience Sampling
  • Simple Random Sampling
  • Stratified Random Sampling
  • Cluster Sampling

3. Identify the sampling design: Mr. Rhoades asks his roommate what his favorite TV show is

  • cluster
  • unbiased
  • stratified
  • convenience

4. Units of the population are ordered in some fashion. Usually, every k-th unit is chosen.

  • proportional
  • probable
  • stratified
  • systematic

5. Interview the first 30 students who enter the school in the morning.

  • simple random
  • voluntary response
  • systematic
  • convenience

6. Identify the sampling design: Student government randomly samples 25 students of each of the four classes.

  • stratified
  • volunteer
  • systematic
  • simple random

7. A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.She selects the first five who raise their hands.

  • Systematic
  • Convenience
  • Voluntary Response
  • Simple Random

8. Identify the sampling design: Mr. Rhoades puts all of his students' names in a hat and randomly selects one without looking.

  • cluster
  • volunteer
  • systematic
  • simple random

9. What sampling method are you using if you survey the students in the school whose names are picked out of a hat?

  • Convenience
  • Systematic
  • Simple Random
  • None of these

10. What sampling method are you using if you survey every 10th person who enters the cafeteria?

  • Convenience
  • Systematic
  • Simple Random
  • Both A & B

11. What sampling method are you using if you survey every 12th customer that enters the amusement park.

  • Convenience
  • Systematic
  • Simple Random
  • None of these

12. You survey every person in the food court at the mall. Which type of sampling method are you using?

  • Convenience
  • Systematic
  • Simple Random
  • Both A & B

13. A ___ is a large group that includes everything being studied.

  • Sample
  • Stratified Sampling Method
  • Population
  • Voluntary-Response

14. A ___ is a small portion of the population used to gather data from.

  • Systematic Sampling Method
  • Sample
  • Population
  • Bias

15. Why do we randomly select our samples?

  • for control
  • reduce bias
  • so we don't get the same answers from everyone
  • to eliminate confounding results

16. Which of the following is TRUE?

  • In a multi-stage random sample, all individuals and all subsets of the sample size have an equal chance of being selected.
  • In a stratified random sample, all individuals and all subsets of the sample size have an equal chance of being selected.
  • In a cluster random sample, all individuals and all subsets of the sample size have an equal chance of being selected.
  • In a simple random sample, all individuals and all subsets of the sample size have an equal chance of being selected.

17. Which of the following is the best definition of a simple random sample?

  • A sample created using random numbers
  • A sample where the simplest method of sampling is used
  • A sample which is representative of the population
  • A sample where each member of the population has an equal chance of being selected

18. The conductor has control over the environment in this setting

  • experiment
  • observational study
  • population
  • sample

19. This method produces values that systematically differ from the population being sampled.

  • valid sample
  • variable sample
  • biased sample
  • cluster sample

20. Every possible group of units of the required size has the same chance of being the selected sample as any other sample of the same size.

  • Simple Random 
  • Thoughtful
  • Typical
  • Proportional

21. A teacher hands out an index card and asks all of her students to write down the following information: age, height (in inches), and what grade they are in.Which of the following best describes her method of data collection?

  • Census
  • Simple Random Sample
  • Cluster Random Sample
  • Stratified Random Sample

22. Units of the population are grouped; one or more groups are selected at random. All units of that group are included in the sample.

  • cluster sample
  • simple random
  • stratified
  • proportional

23. Identify the sampling design: SCPS wants to survey its employees. They pick 4 schools from the county and survey every single employee in each of the 4 buildings.

  • cluster
  • volunteer
  • systematic
  • simple random

24. Leslie wants to find out what show students watch the most. She surveyed the 9 youngest students in the elementary school. Is this sample of the students in the school likely to be representative?

  • yes
  • no
  • Mr. Shinn, I have no idea!
  • All of above

25. Identify the sampling design: School admin conducted a survey on post-graduation plans. Students of senior class 2018 were listed in order by class rank. The school selected a random number between 1 and 15, obtaining a number 11. Then, they selected every 11th student for the survey.

  • cluster
  • volunteer
  • systematic
  • simple random

26. Identify the sampling design: The LFCC registrar wants to investigate attitudes of their graduates. The registrar randomly selects 100 names from each of the four past graduating classes.

  • cluster
  • volunteer
  • stratified
  • simple random

27. Cluster, stratified, simple random, systematic, and proportional are all types of

  • convenience samples
  • biased samples
  • haphazard samples
  • unbiased samples

28. To randomly select 25 basketball players from the 300 players in the NBA, I would:

  • Number the players from 01-25, read 3 digits at a time from a random table, discarding repeats and numbers over 25, and then stop when I reach 25.
  • Number the players from 0-299, read 2 digits at a time from a random table, discarding repeats and numbers over 299, and stop when I reach 25.
  • Number the players from 01-299, read 2 digits at a time from a random table, discarding repeats and numbers over 300, and stop when I reach 25.
  • Number the players from 001-300, read 3 digits at a time from a random table, discarding repeats, 000 and numbers over 300, and stop when I reach 25.

29. An independent research company wants to go door to door to survey people in the city of Fontana. The company decides to number all blocks within the city limit, randomly choose 50 blocks and survey all households on each selected block. This is an example of:

  • Simple Random Sample
  • Stratified Random Sample
  • Cluster Random Sample
  • Systematic Random Sampling

30. Assign each car in a dealership a number and then use a random-number table to select the cars to be inspected.

  • systematic
  • simple random sample
  • convenience
  • volunteer response

31. Political webpages often allow readers to rate (if they want to) whether they strongly agree, agree, disagree, or strongly disagree with the President's decision on any given situation. This is a form of:

  • Self-Selected
  • Convenience Sampling
  • Simple Random Sampling
  • Systematic Random Sampling

32. Elise, a supermarket employee, approached 50 random customers and asked whether they would be willing to discuss what they like most about the store. She interviewed the 22 who said yes. Is this sample of the supermarket's customers likely to be biased?

  • yes
  • no

33. You are investigating the number of dogs in each household in a town. Which of the following descriptions describes a sample. Select all that apply.

  • the number of dogs in every other household on a street in the town
  • the number of dogs in one household in the town
  • the number of dogs in every household in a neighborhood in the town
  • All of above

34. Karla is doing a study to see what the town thinks of the new grocery store. She chooses a convenience sample. Sheasks 13 people from the town who go to the new grocery store. Is there bias in her sample?

  • Yes
  • No

35. You assign the students in your class a number and choose 6 numbers from a basket. What sampling method are you using?

  • Convenience
  • Systematic
  • Simple Random
  • All of above

36. Surveying the students at the next band practice is an example of which type of sampling method?

  • Convenience
  • Systematic
  • Simple Random
  • None of these

37. Surveying the students in one home room is an example of which type of sampling method?

  • Convenience
  • Systematic
  • Simple Random
  • All of above

38. What sampling method are you using if you survey every 5th person who enters the room.

  • Convenience
  • Systematic
  • Simple Random
  • None of these

39. A teacher splits her classes up by period. She then randomly picks 3 students from each period to do a survey.

  • Stratified.
  • Systematic
  • Cluster
  • Biased.

40. A teacher wants to know how well her students are doing on a topic. She randomly picks one class to survey.

  • Simple Random
  • Cluster
  • Stratified
  • Systematic

41. Interview every 10th student who enters the school in the morning.

  • simple random
  • voluntary response
  • systematic
  • convenience

42. Identify the sampling design: Mr. Rhoades asks Mr. May, his neighbor, who his favorite America's Got Talent contestant is

  • cluster
  • unbiased
  • stratified
  • convenience

43. This sample consists of units of the population that chose to respond.

  • mandatory
  • census
  • volunteer
  • unbiased

44. This sample consists of the entire population

  • convenience
  • census
  • cluster
  • simple

45. The conductor has no input or control over the environment in this situation

  • census
  • observational study
  • experiment
  • judgment

46. This sample consists of units of the population that are easily accessible.

  • Cluster
  • Convenience
  • Volunteer
  • Observational

47. This sample is selected by dividing the population into subgroups and then taking a fixed number of units from each group using the simple random sample.

  • stratified
  • cluster
  • judgment
  • experimental

48. You want to ask 100 students their opinions on school dinners so question the first 100 students to enter the dinner hall at lunch time. This is an example of...

  • Random sampling
  • Cluster sampling
  • Opportunity sampling
  • Self-selected sampling

49. Randomly selecting 10 students from each year group in a school is an example of...

  • Simple random sampling
  • Stratified sampling
  • Systematic sampling
  • Quota sampling

50. Selecting every 10th item in the population is an example of a ...

  • Systematic sample
  • Cluster sample
  • Stratified sample
  • Random sample

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