WGU C207 – DATA-DRIVEN DECISION-MAKING FINAL
REAL EXAM 2026/2027 | COMPLETE 200 QUESTIONS &
ANSWERS | BRAND NEW PDF
1. A manager wants to compare the average customer wait times between two
store locations. Which statistical test is MOST appropriate?
A. Chi-square test
B. Two-sample t-test
C. ANOVA
D. Regression analysis
Answer: B
2. In data analytics, a dependent variable is best defined as:
A variable that ______ in response to changes in another variable.
Answer: changes
3. Which type of graph is best for visualizing the distribution of one
continuous variable?
A. Histogram
B. Pie chart
C. Column chart
D. Scatterplot
Answer: A
4. The probability of an event is calculated as:
Number of favorable outcomes / __________________.
Answer: Total possible outcomes
,5. A data analyst wants to explore whether age predicts monthly spending.
Which method should they use?
A. Correlation only
B. Linear regression
C. Chi-square
D. Mean comparison
Answer: B
6. A sample that gives every member of the population an equal chance of
being selected is called:
A. Convenience sampling
B. Stratified sampling
C. Simple random sampling
D. Systematic sampling
Answer: C
7. A researcher reports an alpha level of 0.05. This means there is a 5%
chance of:
A. Accepting a true null hypothesis
B. Making a Type I error
C. Making a Type II error
D. Selecting a biased sample
Answer: B
8. A ______ summarizes the relationship between two quantitative variables
by displaying individual data points.
Answer: scatterplot
,9. In hypothesis testing, the null hypothesis typically states that:
A. A relationship exists
B. The sample is biased
C. No difference or no relationship exists
D. The predictor is significant
Answer: C
10. A dataset contains an extreme outlier. Which measure of central tendency
is LEAST affected by the outlier?
A. Mean
B. Median
C. Mode
D. Range
Answer: B
11. Confidence intervals provide a range of values believed to contain the
________.
Answer: true population parameter
12. A business wants to know whether sales differ across four regions. Which
test should be used?
A. ANOVA
B. Logistic regression
C. One-sample t-test
D. Chi-square goodness-of-fit
Answer: A
13. A Type II error occurs when the analyst:
, A. Rejects a true null hypothesis
B. Fails to reject a false null hypothesis
C. Rejects a false alternative hypothesis
D. Accepts a biased sample
Answer: B
14. The value that appears most frequently in a dataset is known as the
______.
Answer: mode
15. A correlation coefficient of r = –0.85 indicates:
A. Weak positive relationship
B. Strong negative relationship
C. Moderate positive relationship
D. No relationship
Answer: B
16. The process of cleaning, transforming, and organizing data before analysis
is called:
A. Data mining
B. Data wrangling
C. Data visualization
D. Data modeling
Answer: B
17. A ______ variable represents categories with no numerical meaning, such
as colors or brands.
Answer: nominal
REAL EXAM 2026/2027 | COMPLETE 200 QUESTIONS &
ANSWERS | BRAND NEW PDF
1. A manager wants to compare the average customer wait times between two
store locations. Which statistical test is MOST appropriate?
A. Chi-square test
B. Two-sample t-test
C. ANOVA
D. Regression analysis
Answer: B
2. In data analytics, a dependent variable is best defined as:
A variable that ______ in response to changes in another variable.
Answer: changes
3. Which type of graph is best for visualizing the distribution of one
continuous variable?
A. Histogram
B. Pie chart
C. Column chart
D. Scatterplot
Answer: A
4. The probability of an event is calculated as:
Number of favorable outcomes / __________________.
Answer: Total possible outcomes
,5. A data analyst wants to explore whether age predicts monthly spending.
Which method should they use?
A. Correlation only
B. Linear regression
C. Chi-square
D. Mean comparison
Answer: B
6. A sample that gives every member of the population an equal chance of
being selected is called:
A. Convenience sampling
B. Stratified sampling
C. Simple random sampling
D. Systematic sampling
Answer: C
7. A researcher reports an alpha level of 0.05. This means there is a 5%
chance of:
A. Accepting a true null hypothesis
B. Making a Type I error
C. Making a Type II error
D. Selecting a biased sample
Answer: B
8. A ______ summarizes the relationship between two quantitative variables
by displaying individual data points.
Answer: scatterplot
,9. In hypothesis testing, the null hypothesis typically states that:
A. A relationship exists
B. The sample is biased
C. No difference or no relationship exists
D. The predictor is significant
Answer: C
10. A dataset contains an extreme outlier. Which measure of central tendency
is LEAST affected by the outlier?
A. Mean
B. Median
C. Mode
D. Range
Answer: B
11. Confidence intervals provide a range of values believed to contain the
________.
Answer: true population parameter
12. A business wants to know whether sales differ across four regions. Which
test should be used?
A. ANOVA
B. Logistic regression
C. One-sample t-test
D. Chi-square goodness-of-fit
Answer: A
13. A Type II error occurs when the analyst:
, A. Rejects a true null hypothesis
B. Fails to reject a false null hypothesis
C. Rejects a false alternative hypothesis
D. Accepts a biased sample
Answer: B
14. The value that appears most frequently in a dataset is known as the
______.
Answer: mode
15. A correlation coefficient of r = –0.85 indicates:
A. Weak positive relationship
B. Strong negative relationship
C. Moderate positive relationship
D. No relationship
Answer: B
16. The process of cleaning, transforming, and organizing data before analysis
is called:
A. Data mining
B. Data wrangling
C. Data visualization
D. Data modeling
Answer: B
17. A ______ variable represents categories with no numerical meaning, such
as colors or brands.
Answer: nominal
