MATH 225N STATISTICS FINAL EXAM –
CHAMBERLAIN COLLEGE OF NURSING
Actual Questions and Answers
Expert-Verified Explanation
This Exam contains:
✪ 50 Questions and Answers
✪ Multiple-choice and True/False Format
✪ Expert-Verified Explanations
✪ Verified with Trusted Textbooks
1.
The number of goals scored in a hockey game is classified as:
A. Continuous
B. Discrete
C. Qualitative
D. Interval
Answer: B
EXPLANATION: Goals are whole counts (0, 1, 2, …), making them discrete variables.
2.
A scientist assigns plots to new vs. old fertilizer and compares crop yield after one year. What
type of study is this?
A. Observational
B. Experiment
C. Cross-sectional
D. Stratified
Answer: B
EXPLANATION: Random assignment and intervention define this as an experiment.
3.
, A researcher interviews all passengers on five randomly selected cruises. What sampling method
is this?
A. Simple random
B. Cluster
C. Stratified
D. Systematic
Answer: B
EXPLANATION: Cluster sampling selects entire groups (clusters) for study.
4.
A lobbyist assigns numbers to senators and randomly selects 10. What sampling technique is
this?
A. Cluster
B. Stratified
C. Simple random
D. Systematic
Answer: C
EXPLANATION: Every senator had an equal chance of selection—simple random sampling.
5.
Researchers interview 1800 adults about emotional suppression and measure blood pressure.
Data are collected at one time. What study type is this?
A. Cross-sectional
B. Cohort
C. Case-control
D. Experiment
Answer: A
EXPLANATION: Cross-sectional studies collect information at a single point in time.
6.
Thirty-five math majors, 47 music majors, and 51 history majors are randomly chosen from their
groups. This is an example of:
A. Cluster sampling
B. Stratified sampling
CHAMBERLAIN COLLEGE OF NURSING
Actual Questions and Answers
Expert-Verified Explanation
This Exam contains:
✪ 50 Questions and Answers
✪ Multiple-choice and True/False Format
✪ Expert-Verified Explanations
✪ Verified with Trusted Textbooks
1.
The number of goals scored in a hockey game is classified as:
A. Continuous
B. Discrete
C. Qualitative
D. Interval
Answer: B
EXPLANATION: Goals are whole counts (0, 1, 2, …), making them discrete variables.
2.
A scientist assigns plots to new vs. old fertilizer and compares crop yield after one year. What
type of study is this?
A. Observational
B. Experiment
C. Cross-sectional
D. Stratified
Answer: B
EXPLANATION: Random assignment and intervention define this as an experiment.
3.
, A researcher interviews all passengers on five randomly selected cruises. What sampling method
is this?
A. Simple random
B. Cluster
C. Stratified
D. Systematic
Answer: B
EXPLANATION: Cluster sampling selects entire groups (clusters) for study.
4.
A lobbyist assigns numbers to senators and randomly selects 10. What sampling technique is
this?
A. Cluster
B. Stratified
C. Simple random
D. Systematic
Answer: C
EXPLANATION: Every senator had an equal chance of selection—simple random sampling.
5.
Researchers interview 1800 adults about emotional suppression and measure blood pressure.
Data are collected at one time. What study type is this?
A. Cross-sectional
B. Cohort
C. Case-control
D. Experiment
Answer: A
EXPLANATION: Cross-sectional studies collect information at a single point in time.
6.
Thirty-five math majors, 47 music majors, and 51 history majors are randomly chosen from their
groups. This is an example of:
A. Cluster sampling
B. Stratified sampling
