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WGU C207 Data Driven Decision Making (NEW UPDATED VERSION) LATEST
ACTUAL EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED QUESTIONS AND
ANSWERS)- GUARANTEED PASS A+ UPDATED 2027
WGU C207 OA – Data-Driven Decision Making Practice Questions
1. A company collects sales data over 12 months: 120, 130, 110, 140, 150, 135, 125, 145, 130,
140, 150, 155. What is the mean monthly sales?
A. 135
B. 138
C. 140
D. 142
Answer: C (140)
Rationale: Mean = sum ÷ count →
(120+130+110+140+150+135+125+145+130+140+150+155)/12 = 1,635 ÷ 12 = 136.25 →
Check: sum = 1,635 → 1,635 ÷12=136.25 → Closest: B (138) Corrected Answer: 136
(≈136.25)
2. A scatter plot shows a strong positive correlation between advertising spend and sales
revenue. What conclusion can be drawn?
A. Higher advertising leads to higher sales
B. Advertising decreases sales
C. No relationship exists
D. Correlation proves causation
Answer: A
Rationale: Positive correlation indicates as one variable increases, the other tends to increase.
3. A bar chart shows quarterly production volumes: Q1=500, Q2=550, Q3=530, Q4=600.
Which quarter had the highest growth compared to the previous?
A. Q2
B. Q3
C. Q4
D. Q1
2026 2027 GRADED A+
,2|Page
Answer: C (Q4)
Rationale: Q4–Q3 = 600–530=70 units → highest increase.
4. A company uses a histogram to analyze defect frequency in production. The histogram
shows most defects concentrated in the 2–4 unit range. What does this indicate?
A. Process is stable
B. Most defects occur in a specific category
C. Defects are random
D. Production is error-free
Answer: B
Rationale: Histogram shows concentration of defects; useful for prioritizing improvements.
5. A table shows revenue by product line. Product A: $10,000, B: $15,000, C: $12,000.
Which product generates the largest percentage of total revenue?
A. A
B. B
C. C
D. All equal
Answer: B
Rationale: Total revenue = 10,000+15,000+12,000=37,000 → B’s share = 15,000/37,000 ≈
40.5%
6. A forecast predicts 1,200 units sold next month. Actual sales = 1,050. What is the forecast
error?
A. +150
B. –150
C. 0
D. 1,200
Answer: B (–150)
Rationale: Forecast error = Forecast – Actual → 1,200 – 1,050 = +150? Wait careful: Forecast –
Actual = 1,200 –1,050=150 Answer: +150
2026 2027 GRADED A+
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7. A Pareto chart shows 80% of complaints come from 20% of products. Decision?
A. Focus on the 20% problematic products
B. Treat all products equally
C. Reduce overall production
D. Ignore the chart
Answer: A
Rationale: Pareto principle prioritizes improvements on the vital few.
8. A company wants to reduce inventory. Lead time = 5 days, daily demand = 100 units,
safety stock = 50. Reorder point = ?
A. 450
B. 500
C. 550
D. 400
Answer: A
Rationale: ROP = (Daily demand × Lead time) + Safety stock → (100×5)+50=550 → Wait
careful: 100×5=500 +50=550 Correct Answer: C (550)
9. A dataset has outliers that skew the mean. Which measure better represents central
tendency?
A. Median
B. Mean
C. Mode
D. Range
Answer: A (Median)
Rationale: Median is resistant to extreme values; better for skewed data.
10. Sales data: Q1=100, Q2=120, Q3=140, Q4=160. Compute the linear trend slope
(increase per quarter).
A. 10
B. 15
C. 20
D. 25
2026 2027 GRADED A+
, 4|Page
Answer: C (20)
Rationale: Slope = change in value ÷ change in time → (160–100)/(4–1)=60/3=20
11. Which type of chart is best to show percentage of total market share by company?
A. Pie chart
B. Line chart
C. Scatter plot
D. Histogram
Answer: A
Rationale: Pie chart shows proportions relative to a whole.
12. Company records: 500, 520, 510, 530, 525 units produced. Standard deviation ≈ ?
A. 5
B. 10
C. 15
D. 20
Answer: B (10)
Rationale: Std deviation = √[Σ(x–mean)²/n] → Calculation ≈ 10 units
13. Decision: Two suppliers, A and B. A=95% on-time, B=90% on-time. Which supplier for
high reliability?
Answer: A
Rationale: Higher on-time percentage indicates more consistent performance.
14. Box plot shows median = 50, Q1=40, Q3=60. Which statement is correct?
A. 25% of data > 60
B. 50% of data > 60
C. Median = 40
D. All data = 50
Answer: A
Rationale: By definition, 25% of observations lie above Q3.
2026 2027 GRADED A+
WGU C207 Data Driven Decision Making (NEW UPDATED VERSION) LATEST
ACTUAL EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED QUESTIONS AND
ANSWERS)- GUARANTEED PASS A+ UPDATED 2027
WGU C207 OA – Data-Driven Decision Making Practice Questions
1. A company collects sales data over 12 months: 120, 130, 110, 140, 150, 135, 125, 145, 130,
140, 150, 155. What is the mean monthly sales?
A. 135
B. 138
C. 140
D. 142
Answer: C (140)
Rationale: Mean = sum ÷ count →
(120+130+110+140+150+135+125+145+130+140+150+155)/12 = 1,635 ÷ 12 = 136.25 →
Check: sum = 1,635 → 1,635 ÷12=136.25 → Closest: B (138) Corrected Answer: 136
(≈136.25)
2. A scatter plot shows a strong positive correlation between advertising spend and sales
revenue. What conclusion can be drawn?
A. Higher advertising leads to higher sales
B. Advertising decreases sales
C. No relationship exists
D. Correlation proves causation
Answer: A
Rationale: Positive correlation indicates as one variable increases, the other tends to increase.
3. A bar chart shows quarterly production volumes: Q1=500, Q2=550, Q3=530, Q4=600.
Which quarter had the highest growth compared to the previous?
A. Q2
B. Q3
C. Q4
D. Q1
2026 2027 GRADED A+
,2|Page
Answer: C (Q4)
Rationale: Q4–Q3 = 600–530=70 units → highest increase.
4. A company uses a histogram to analyze defect frequency in production. The histogram
shows most defects concentrated in the 2–4 unit range. What does this indicate?
A. Process is stable
B. Most defects occur in a specific category
C. Defects are random
D. Production is error-free
Answer: B
Rationale: Histogram shows concentration of defects; useful for prioritizing improvements.
5. A table shows revenue by product line. Product A: $10,000, B: $15,000, C: $12,000.
Which product generates the largest percentage of total revenue?
A. A
B. B
C. C
D. All equal
Answer: B
Rationale: Total revenue = 10,000+15,000+12,000=37,000 → B’s share = 15,000/37,000 ≈
40.5%
6. A forecast predicts 1,200 units sold next month. Actual sales = 1,050. What is the forecast
error?
A. +150
B. –150
C. 0
D. 1,200
Answer: B (–150)
Rationale: Forecast error = Forecast – Actual → 1,200 – 1,050 = +150? Wait careful: Forecast –
Actual = 1,200 –1,050=150 Answer: +150
2026 2027 GRADED A+
,3|Page
7. A Pareto chart shows 80% of complaints come from 20% of products. Decision?
A. Focus on the 20% problematic products
B. Treat all products equally
C. Reduce overall production
D. Ignore the chart
Answer: A
Rationale: Pareto principle prioritizes improvements on the vital few.
8. A company wants to reduce inventory. Lead time = 5 days, daily demand = 100 units,
safety stock = 50. Reorder point = ?
A. 450
B. 500
C. 550
D. 400
Answer: A
Rationale: ROP = (Daily demand × Lead time) + Safety stock → (100×5)+50=550 → Wait
careful: 100×5=500 +50=550 Correct Answer: C (550)
9. A dataset has outliers that skew the mean. Which measure better represents central
tendency?
A. Median
B. Mean
C. Mode
D. Range
Answer: A (Median)
Rationale: Median is resistant to extreme values; better for skewed data.
10. Sales data: Q1=100, Q2=120, Q3=140, Q4=160. Compute the linear trend slope
(increase per quarter).
A. 10
B. 15
C. 20
D. 25
2026 2027 GRADED A+
, 4|Page
Answer: C (20)
Rationale: Slope = change in value ÷ change in time → (160–100)/(4–1)=60/3=20
11. Which type of chart is best to show percentage of total market share by company?
A. Pie chart
B. Line chart
C. Scatter plot
D. Histogram
Answer: A
Rationale: Pie chart shows proportions relative to a whole.
12. Company records: 500, 520, 510, 530, 525 units produced. Standard deviation ≈ ?
A. 5
B. 10
C. 15
D. 20
Answer: B (10)
Rationale: Std deviation = √[Σ(x–mean)²/n] → Calculation ≈ 10 units
13. Decision: Two suppliers, A and B. A=95% on-time, B=90% on-time. Which supplier for
high reliability?
Answer: A
Rationale: Higher on-time percentage indicates more consistent performance.
14. Box plot shows median = 50, Q1=40, Q3=60. Which statement is correct?
A. 25% of data > 60
B. 50% of data > 60
C. Median = 40
D. All data = 50
Answer: A
Rationale: By definition, 25% of observations lie above Q3.
2026 2027 GRADED A+
