STATISTICAL INFERENCE EXAMINATION QUESTIONS AND CORRECT ANSWER WITH EXPLANATION GRADED A+ STUDY GUIDE

STATISTICAL INFERENCE EXAMINATION QUESTIONS AND
CORRECT ANSWER WITH EXPLANATION GRADED A+
STUDY GUIDE SOUTHERN NEW HAMPSHIRE UNIVERSITY
1. Statistical inference is the process of:
A. Drawing conclusions from data
B. Drawing graphs only
C. Writing code
D. Collecting images
Answer: A
Rationale: It involves making conclusions from sample data.

2. Population in inference refers to:
A. Entire group of interest
B. Sample only
C. Single observation
D. Graph only
Answer: A
Rationale: The full set of individuals.

3. Sample is:
A. Subset of population
B. Entire population
C. Random guess
D. Constant value
Answer: A
Rationale: Representative portion.

4. Parameter is:
A. Population characteristic
B. Sample characteristic
C. Graph value
D. Error term
Answer: A
Rationale: Describes population.

5. Statistic is:
A. Sample characteristic

, B. Population value
C. Constant
D. Error only
Answer: A
Rationale: Describes sample.

6. Estimation is used to:
A. Approximate parameters
B. Find exact values always
C. Draw graphs
D. Store data
Answer: A
Rationale: Approximate unknowns.

7. Point estimate is:
A. Single value estimate
B. Range estimate
C. Graph
D. Table
Answer: A
Rationale: One best guess.

8. Interval estimate provides:
A. Range of values
B. Single value
C. Constant
D. Error only
Answer: A
Rationale: Uncertainty range.

9. Confidence interval is:
A. Range of plausible values
B. Exact value
C. Random guess
D. Fixed number
Answer: A
Rationale: Estimation range.

10. 95% confidence means:
A. Method captures true value 95% of time

, B. Value is exact
C. Always correct
D. Always wrong
Answer: A
Rationale: Long-run reliability.

11. Hypothesis testing is used to:
A. Test claims about population
B. Draw graphs
C. Sort data
D. Paint images
Answer: A
Rationale: Statistical decision-making.

12. Null hypothesis (H0) states:
A. No effect or difference
B. Effect exists
C. Random statement
D. Error condition
Answer: A
Rationale: Baseline assumption.

13. Alternative hypothesis (H1) states:
A. Effect or difference exists
B. No difference
C. Constant value
D. Error only
Answer: A
Rationale: Competing claim.

14. p-value is:
A. Probability of observed result under H0
B. Mean value
C. Sample size
D. Constant
Answer: A
Rationale: Evidence measure.

15. Small p-value suggests:
A. Reject null hypothesis