ASB 112 – Sampling and Testing Exam
Questions With Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary purpose of sampling in testing?
A. To test every item in a population
B. To reduce cost and time while obtaining representative
data
C. To eliminate measurement error
D. To increase sample size indefinitely
Answer: B
Rationale: Sampling allows conclusions about a
population without testing every unit, saving time and
resources while maintaining representativeness.
2. A sample that accurately reflects the population is called:
A. Biased sample
B. Random sample
C. Representative sample
D. Cluster sample
Answer: C
, Rationale: A representative sample closely mirrors the
characteristics of the population from which it is drawn.
3. Which method gives every member of a population an
equal chance of selection?
A. Stratified sampling
B. Systematic sampling
C. Random sampling
D. Judgment sampling
Answer: C
Rationale: Random sampling ensures each individual has
an equal probability of being selected, reducing bias.
4. Sampling bias occurs when:
A. Sample size is too large
B. Sample is randomly selected
C. Sample is not representative of the population
D. Data is collected repeatedly
Answer: C
Rationale: Bias arises when the sampling process
systematically favors certain outcomes or groups.
,5. Which sampling technique divides the population into
subgroups before sampling?
A. Cluster sampling
B. Stratified sampling
C. Simple random sampling
D. Convenience sampling
Answer: B
Rationale: Stratified sampling ensures representation by
dividing the population into homogeneous groups before
sampling.
6. In systematic sampling, selection is done:
A. Using judgment
B. At random intervals
C. At fixed intervals after a random start
D. Only once
Answer: C
Rationale: Systematic sampling selects every kth element
after a random starting point.
7. A sampling frame is:
A. A testing device
B. A list of all population elements
C. A laboratory tool
, D. A statistical formula
Answer: B
Rationale: A sampling frame is the complete list from
which a sample is drawn.
8. Which is a non-probability sampling method?
A. Simple random sampling
B. Stratified sampling
C. Convenience sampling
D. Systematic sampling
Answer: C
Rationale: Convenience sampling selects easily available
subjects, not randomly.
9. Increasing sample size generally:
A. Increases bias
B. Decreases precision
C. Increases precision
D. Has no effect
Answer: C
Rationale: Larger samples reduce sampling error and
improve precision.
Questions With Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary purpose of sampling in testing?
A. To test every item in a population
B. To reduce cost and time while obtaining representative
data
C. To eliminate measurement error
D. To increase sample size indefinitely
Answer: B
Rationale: Sampling allows conclusions about a
population without testing every unit, saving time and
resources while maintaining representativeness.
2. A sample that accurately reflects the population is called:
A. Biased sample
B. Random sample
C. Representative sample
D. Cluster sample
Answer: C
, Rationale: A representative sample closely mirrors the
characteristics of the population from which it is drawn.
3. Which method gives every member of a population an
equal chance of selection?
A. Stratified sampling
B. Systematic sampling
C. Random sampling
D. Judgment sampling
Answer: C
Rationale: Random sampling ensures each individual has
an equal probability of being selected, reducing bias.
4. Sampling bias occurs when:
A. Sample size is too large
B. Sample is randomly selected
C. Sample is not representative of the population
D. Data is collected repeatedly
Answer: C
Rationale: Bias arises when the sampling process
systematically favors certain outcomes or groups.
,5. Which sampling technique divides the population into
subgroups before sampling?
A. Cluster sampling
B. Stratified sampling
C. Simple random sampling
D. Convenience sampling
Answer: B
Rationale: Stratified sampling ensures representation by
dividing the population into homogeneous groups before
sampling.
6. In systematic sampling, selection is done:
A. Using judgment
B. At random intervals
C. At fixed intervals after a random start
D. Only once
Answer: C
Rationale: Systematic sampling selects every kth element
after a random starting point.
7. A sampling frame is:
A. A testing device
B. A list of all population elements
C. A laboratory tool
, D. A statistical formula
Answer: B
Rationale: A sampling frame is the complete list from
which a sample is drawn.
8. Which is a non-probability sampling method?
A. Simple random sampling
B. Stratified sampling
C. Convenience sampling
D. Systematic sampling
Answer: C
Rationale: Convenience sampling selects easily available
subjects, not randomly.
9. Increasing sample size generally:
A. Increases bias
B. Decreases precision
C. Increases precision
D. Has no effect
Answer: C
Rationale: Larger samples reduce sampling error and
improve precision.
