TESTBANK STATISTICS FOR BUSINESS AND
ECONOMICS 8TH EDITION QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) Q&A
2026 |INSTANT DOWNLOAD PDF
1. What is the best measure of central tendency for highly
skewed data?
A. Mean
B. Median
C. Mode
D. Variance
Rationale: Skewed data is influenced by extreme values, so the
median is more robust.
Correct answer: B. Median
2. Which measure describes how spread out data values are?
A. Mean
B. Standard deviation
C. Median
D. Frequency
Rationale: Standard deviation measures dispersion around the
mean.
Correct answer: B. Standard deviation
,3. The sum of all deviations from the mean is always:
A. Positive
B. Negative
C. Zero
D. Undefined
Rationale: Deviations above and below the mean cancel out.
Correct answer: C. Zero
2. Probability
4. What is the probability of an impossible event?
A. 1
B. 0
C. 0.5
D. Undefined
Rationale: Impossible events never occur.
Correct answer: B. 0
5. If two events are independent, their joint probability is
found by:
A. Adding probabilities
B. Subtracting probabilities
C. Multiplying probabilities
D. Dividing probabilities
Rationale: Independence means multiplication rule applies.
Correct answer: C. Multiplying probabilities
,6. The probability of an event plus its complement equals:
A. 0
B. 0.5
C. 1
D. 2
Rationale: Complements cover all outcomes in a sample space.
Correct answer: C. 1
3. Inferential Statistics
7. A p-value less than 0.05 usually indicates:
A. Accept null hypothesis
B. Reject null hypothesis
C. No conclusion
D. Data is invalid
Rationale: Low p-value suggests strong evidence against H₀.
Correct answer: B. Reject null hypothesis
8. Type I error occurs when we:
A. Accept a false null hypothesis
B. Reject a true null hypothesis
C. Accept a true alternative
D. Fail to collect data
Rationale: Type I error is a false positive.
Correct answer: B. Reject a true null hypothesis
, 9. Confidence intervals estimate:
A. Exact population value
B. Range of likely population parameter
C. Sample size
D. Standard deviation only
Rationale: They provide a range estimate, not a fixed value.
Correct answer: B. Range of likely population parameter
4. Regression & Correlation
10. A correlation coefficient of +1 means:
A. No relationship
B. Perfect negative relationship
C. Perfect positive relationship
D. Weak relationship
Rationale: +1 indicates perfect linear positive relationship.
Correct answer: C. Perfect positive relationship
11. Regression analysis is used to:
A. Classify data only
B. Predict one variable from another
C. Calculate frequency
D. Measure dispersion
Rationale: Regression models relationships for prediction.
Correct answer: B. Predict one variable from another
ECONOMICS 8TH EDITION QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) Q&A
2026 |INSTANT DOWNLOAD PDF
1. What is the best measure of central tendency for highly
skewed data?
A. Mean
B. Median
C. Mode
D. Variance
Rationale: Skewed data is influenced by extreme values, so the
median is more robust.
Correct answer: B. Median
2. Which measure describes how spread out data values are?
A. Mean
B. Standard deviation
C. Median
D. Frequency
Rationale: Standard deviation measures dispersion around the
mean.
Correct answer: B. Standard deviation
,3. The sum of all deviations from the mean is always:
A. Positive
B. Negative
C. Zero
D. Undefined
Rationale: Deviations above and below the mean cancel out.
Correct answer: C. Zero
2. Probability
4. What is the probability of an impossible event?
A. 1
B. 0
C. 0.5
D. Undefined
Rationale: Impossible events never occur.
Correct answer: B. 0
5. If two events are independent, their joint probability is
found by:
A. Adding probabilities
B. Subtracting probabilities
C. Multiplying probabilities
D. Dividing probabilities
Rationale: Independence means multiplication rule applies.
Correct answer: C. Multiplying probabilities
,6. The probability of an event plus its complement equals:
A. 0
B. 0.5
C. 1
D. 2
Rationale: Complements cover all outcomes in a sample space.
Correct answer: C. 1
3. Inferential Statistics
7. A p-value less than 0.05 usually indicates:
A. Accept null hypothesis
B. Reject null hypothesis
C. No conclusion
D. Data is invalid
Rationale: Low p-value suggests strong evidence against H₀.
Correct answer: B. Reject null hypothesis
8. Type I error occurs when we:
A. Accept a false null hypothesis
B. Reject a true null hypothesis
C. Accept a true alternative
D. Fail to collect data
Rationale: Type I error is a false positive.
Correct answer: B. Reject a true null hypothesis
, 9. Confidence intervals estimate:
A. Exact population value
B. Range of likely population parameter
C. Sample size
D. Standard deviation only
Rationale: They provide a range estimate, not a fixed value.
Correct answer: B. Range of likely population parameter
4. Regression & Correlation
10. A correlation coefficient of +1 means:
A. No relationship
B. Perfect negative relationship
C. Perfect positive relationship
D. Weak relationship
Rationale: +1 indicates perfect linear positive relationship.
Correct answer: C. Perfect positive relationship
11. Regression analysis is used to:
A. Classify data only
B. Predict one variable from another
C. Calculate frequency
D. Measure dispersion
Rationale: Regression models relationships for prediction.
Correct answer: B. Predict one variable from another
