WGU C207 Data-Driven Decision-Making Actual
Exam (2025/2026)
Verified Questions and 100% Correct Answers |
Graded A
Prepared for Western Governors University
Multiple-Choice Questions
A manager uses a tool to forecast future sales based on historical data trends. Which
type of analytics is being applied?
a) Descriptive Analytics
b) Predictive Analytics
c) Prescriptive Analytics
d) Diagnostic Analytics
Correct Answer: b
Rationale: Predictive Analytics uses historical data to forecast future outcomes, such as
sales trends. This aligns with data analysis principles of modeling to anticipate events.
Descriptive analytics summarizes past data, diagnostic analytics identifies causes, and
prescriptive analytics recommends actions.
Which visualization tool is best suited to display the frequency distribution of customer
purchase amounts?
a) Pie Chart
b) Histogram
c) Line Graph
d) Scatter Plot
Correct Answer: b
Rationale: A histogram displays frequency distributions by grouping data into bins, ideal
for visualizing purchase amounts. Visualization principles emphasize selecting tools that
match data types; pie charts show proportions, line graphs track trends, and scatter plots
show relationships.
1
,A researcher collects customer feedback without informed consent. Which ethical princi-
ple is violated?
a) Confidentiality
b) Transparency
c) Autonomy
d) Accuracy
Correct Answer: c
Rationale: Autonomy is violated when participants are not given the choice to consent,
undermining their control over personal data. Ethical data analysis requires respecting
participant rights, unlike confidentiality (data protection), transparency (openness), or
accuracy (data correctness).
In a dataset, what type of data is represented by customer satisfaction ratings of 1 to 5?
a) Nominal
b) Ordinal
c) Interval
d) Ratio
Correct Answer: b
Rationale: Ordinal data has ordered categories with unequal intervals, like satisfaction
ratings. Data analysis principles classify nominal data as unordered, interval data as
equal intervals without a true zero, and ratio data as having a true zero.
A company uses a control chart to monitor production defects. This is part of which
quality management process?
a) Plan-Do-Check-Act
b) Six Sigma
c) Lean Manufacturing
d) Total Quality Management
Correct Answer: a
Rationale: Control charts are used in the Check phase of the Plan-Do-Check-Act cycle
to monitor process stability. Data analysis principles support using statistical tools to
assess quality, unlike Six Sigma (methodology), Lean (waste reduction), or TQM (holistic
approach).
Which measure of central tendency is most affected by extreme values in a dataset?
a) Median
b) Mode
c) Mean
d) Midrange
Correct Answer: c
Rationale: The mean is sensitive to extreme values as it averages all data points. Data
analysis principles highlight the medians robustness to outliers, the modes focus on fre-
quency, and the midranges use of extremes, making mean the most affected.
2
, A bar chart comparing sales across regions is mislabeled, leading to incorrect conclusions.
What visualization principle is violated?
a) Clarity
b) Simplicity
c) Relevance
d) Aesthetics
Correct Answer: a
Rationale: Clarity ensures accurate labeling to prevent misinterpretation. Visualization
principles prioritize clear communication, while simplicity avoids complexity, relevance
ensures appropriate data, and aesthetics enhances appeal without sacrificing accuracy.
What type of error occurs when a scale consistently overweighs products by 5 grams?
a) Random Error
b) Systematic Error
c) Omission Error
d) Outlier Error
Correct Answer: b
Rationale: Systematic error is consistent and repeatable, like a miscalibrated scale. Data
analysis principles distinguish it from random error (unpredictable), omission error (miss-
ing data), and outlier error (extreme values).
A study uses a double-blind method to test a new drug. What is the primary benefit of
this approach?
a) Reduces Bias
b) Increases Sample Size
c) Simplifies Data Collection
d) Ensures Data Accuracy
Correct Answer: a
Rationale: Double-blind studies reduce bias by keeping participants and researchers un-
aware of group assignments. Ethical data analysis emphasizes minimizing bias to ensure
valid results, unlike increasing sample size, simplifying collection, or ensuring accuracy.
Which statistical test compares means between two independent groups?
a) ANOVA
b) Chi-Square Test
c) T-Test
d) Correlation Analysis
Correct Answer: c
Rationale: A t-test compares means of two independent groups. Data analysis principles
select tests based on data type and hypothesis; ANOVA compares multiple groups, chi-
square tests categorical data, and correlation measures relationships.
3
Exam (2025/2026)
Verified Questions and 100% Correct Answers |
Graded A
Prepared for Western Governors University
Multiple-Choice Questions
A manager uses a tool to forecast future sales based on historical data trends. Which
type of analytics is being applied?
a) Descriptive Analytics
b) Predictive Analytics
c) Prescriptive Analytics
d) Diagnostic Analytics
Correct Answer: b
Rationale: Predictive Analytics uses historical data to forecast future outcomes, such as
sales trends. This aligns with data analysis principles of modeling to anticipate events.
Descriptive analytics summarizes past data, diagnostic analytics identifies causes, and
prescriptive analytics recommends actions.
Which visualization tool is best suited to display the frequency distribution of customer
purchase amounts?
a) Pie Chart
b) Histogram
c) Line Graph
d) Scatter Plot
Correct Answer: b
Rationale: A histogram displays frequency distributions by grouping data into bins, ideal
for visualizing purchase amounts. Visualization principles emphasize selecting tools that
match data types; pie charts show proportions, line graphs track trends, and scatter plots
show relationships.
1
,A researcher collects customer feedback without informed consent. Which ethical princi-
ple is violated?
a) Confidentiality
b) Transparency
c) Autonomy
d) Accuracy
Correct Answer: c
Rationale: Autonomy is violated when participants are not given the choice to consent,
undermining their control over personal data. Ethical data analysis requires respecting
participant rights, unlike confidentiality (data protection), transparency (openness), or
accuracy (data correctness).
In a dataset, what type of data is represented by customer satisfaction ratings of 1 to 5?
a) Nominal
b) Ordinal
c) Interval
d) Ratio
Correct Answer: b
Rationale: Ordinal data has ordered categories with unequal intervals, like satisfaction
ratings. Data analysis principles classify nominal data as unordered, interval data as
equal intervals without a true zero, and ratio data as having a true zero.
A company uses a control chart to monitor production defects. This is part of which
quality management process?
a) Plan-Do-Check-Act
b) Six Sigma
c) Lean Manufacturing
d) Total Quality Management
Correct Answer: a
Rationale: Control charts are used in the Check phase of the Plan-Do-Check-Act cycle
to monitor process stability. Data analysis principles support using statistical tools to
assess quality, unlike Six Sigma (methodology), Lean (waste reduction), or TQM (holistic
approach).
Which measure of central tendency is most affected by extreme values in a dataset?
a) Median
b) Mode
c) Mean
d) Midrange
Correct Answer: c
Rationale: The mean is sensitive to extreme values as it averages all data points. Data
analysis principles highlight the medians robustness to outliers, the modes focus on fre-
quency, and the midranges use of extremes, making mean the most affected.
2
, A bar chart comparing sales across regions is mislabeled, leading to incorrect conclusions.
What visualization principle is violated?
a) Clarity
b) Simplicity
c) Relevance
d) Aesthetics
Correct Answer: a
Rationale: Clarity ensures accurate labeling to prevent misinterpretation. Visualization
principles prioritize clear communication, while simplicity avoids complexity, relevance
ensures appropriate data, and aesthetics enhances appeal without sacrificing accuracy.
What type of error occurs when a scale consistently overweighs products by 5 grams?
a) Random Error
b) Systematic Error
c) Omission Error
d) Outlier Error
Correct Answer: b
Rationale: Systematic error is consistent and repeatable, like a miscalibrated scale. Data
analysis principles distinguish it from random error (unpredictable), omission error (miss-
ing data), and outlier error (extreme values).
A study uses a double-blind method to test a new drug. What is the primary benefit of
this approach?
a) Reduces Bias
b) Increases Sample Size
c) Simplifies Data Collection
d) Ensures Data Accuracy
Correct Answer: a
Rationale: Double-blind studies reduce bias by keeping participants and researchers un-
aware of group assignments. Ethical data analysis emphasizes minimizing bias to ensure
valid results, unlike increasing sample size, simplifying collection, or ensuring accuracy.
Which statistical test compares means between two independent groups?
a) ANOVA
b) Chi-Square Test
c) T-Test
d) Correlation Analysis
Correct Answer: c
Rationale: A t-test compares means of two independent groups. Data analysis principles
select tests based on data type and hypothesis; ANOVA compares multiple groups, chi-
square tests categorical data, and correlation measures relationships.
3
