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

STATISTICAL ANALYSIS EXAMINATION QUESTIONS AND
CORRECT ANSWER WITH EXPLANATION GRADED
A+STUDY GUIDE SOUTHERN NEW HAMPSHIRE
UNIVERSITY

1. Statistics is the study of:

A. Data collection, analysis, and interpretation
B. Computer hardware
C. Programming only
D. Network security
Answer: A
Rationale: Statistics focuses on handling and interpreting data.



2. Descriptive statistics deals with:

A. Summarizing data
B. Predicting future events
C. Encrypting data
D. Building models only
Answer: A
Rationale: It describes data using summaries.



3. Inferential statistics is used to:

A. Make predictions about a population
B. Store data
C. Delete data
D. Encrypt data
Answer: A
Rationale: It draws conclusions from samples.



4. Population in statistics means:

,A. Entire group of interest
B. Small sample
C. Single data point
D. Random variable
Answer: A
Rationale: All members being studied.



5. Sample means:

A. Subset of population
B. Entire population
C. Single value
D. Outlier
Answer: A
Rationale: Representative subset.



6. Mean is:

A. Average value
B. Middle value
C. Most frequent value
D. Random value
Answer: A
Rationale: Sum divided by number of values.



7. Median is:

A. Middle value
B. Average
C. Mode
D. Sum
Answer: A
Rationale: Central value in ordered data.



8. Mode is:

, A. Most frequent value
B. Middle value
C. Average
D. Range
Answer: A
Rationale: Most common observation.



9. Range is:

A. Difference between max and min
B. Average
C. Median
D. Mode
Answer: A
Rationale: Spread measure.



10. Variance measures:

A. Data dispersion
B. Central tendency
C. Probability
D. Frequency
Answer: A
Rationale: Spread of data.



11. Standard deviation is:

A. Square root of variance
B. Sum of values
C. Average
D. Median
Answer: A
Rationale: Measures spread in same units.



12. A normal distribution is: