STATISTICS EXAM QUESTIONS AND ANSWERS
Actual Questions and Answers
Expert-Verified Explanation
This Exam contains:
✪ 40 Questions and Answers
✪ Multiple-choice and True/False Format
✪ Expert-Verified Explanations
✪ Verified with Trusted Textbooks
1. What is the population in a Pew Research Poll?
A. College students
B. Registered voters
C. All U.S. adults
D. Random volunteers
Answer: C
EXPLANATION: Pew Research surveys aim to represent the full adult U.S. population.
2. What is an advantage of convenience samples?
A. They are always accurate
B. They represent all demographics equally
C. Convenience sampling is easier
D. They eliminate sampling bias
Answer: C
EXPLANATION: Convenience samples are easy to collect, though not always representative.
3. What are characteristics of a good sample?
A. It is small and convenient
B. It includes only volunteers
C. Bias and sampling variability are small
D. It includes everyone in the population
Answer: C
EXPLANATION: Minimizing bias and variability ensures valid conclusions.
4. How is a stratified random sample created?
A. Every individual has the same chance
B. Individuals are grouped and randomly selected within groups
C. Volunteers are selected from the population
, D. Researchers choose the most accessible group
Answer: B
EXPLANATION: Stratification ensures representation from each subgroup.
5. What type of study is mindfulness research typically classified as?
A. Experimental
B. Quasi-experiment
C. Observational
D. Double-blind
Answer: B
EXPLANATION: It lacks random assignment, hence quasi-experimental.
6. What describes consistency of measurements?
A. Inter-rater reliability
B. Test-retest reliability
C. Construct validity
D. Sampling error
Answer: B
EXPLANATION: Test-retest evaluates consistency over time.
7. Which graph best shows current smokers over time?
A. Histogram
B. Pie chart
C. Line graph
D. Bar chart
Answer: C
EXPLANATION: Line graphs display trends across time.
8. When is it appropriate to use mean and standard deviation?
A. For skewed distributions
B. When data is ordinal
C. When the distribution is symmetrical
D. With qualitative data
Answer: C
EXPLANATION: Mean and standard deviation assume normality.
Actual Questions and Answers
Expert-Verified Explanation
This Exam contains:
✪ 40 Questions and Answers
✪ Multiple-choice and True/False Format
✪ Expert-Verified Explanations
✪ Verified with Trusted Textbooks
1. What is the population in a Pew Research Poll?
A. College students
B. Registered voters
C. All U.S. adults
D. Random volunteers
Answer: C
EXPLANATION: Pew Research surveys aim to represent the full adult U.S. population.
2. What is an advantage of convenience samples?
A. They are always accurate
B. They represent all demographics equally
C. Convenience sampling is easier
D. They eliminate sampling bias
Answer: C
EXPLANATION: Convenience samples are easy to collect, though not always representative.
3. What are characteristics of a good sample?
A. It is small and convenient
B. It includes only volunteers
C. Bias and sampling variability are small
D. It includes everyone in the population
Answer: C
EXPLANATION: Minimizing bias and variability ensures valid conclusions.
4. How is a stratified random sample created?
A. Every individual has the same chance
B. Individuals are grouped and randomly selected within groups
C. Volunteers are selected from the population
, D. Researchers choose the most accessible group
Answer: B
EXPLANATION: Stratification ensures representation from each subgroup.
5. What type of study is mindfulness research typically classified as?
A. Experimental
B. Quasi-experiment
C. Observational
D. Double-blind
Answer: B
EXPLANATION: It lacks random assignment, hence quasi-experimental.
6. What describes consistency of measurements?
A. Inter-rater reliability
B. Test-retest reliability
C. Construct validity
D. Sampling error
Answer: B
EXPLANATION: Test-retest evaluates consistency over time.
7. Which graph best shows current smokers over time?
A. Histogram
B. Pie chart
C. Line graph
D. Bar chart
Answer: C
EXPLANATION: Line graphs display trends across time.
8. When is it appropriate to use mean and standard deviation?
A. For skewed distributions
B. When data is ordinal
C. When the distribution is symmetrical
D. With qualitative data
Answer: C
EXPLANATION: Mean and standard deviation assume normality.
