Virtual Job Tryout Data Analysis and Interpretation 5 — Questions and Answers
Question 1: A trend analysis shows revenue growing at roughly 5% per quarter. If current revenue is $200K, what is the best estimate for next quarter?
- $210,000 (Correct answer)
- $205,000
- $220,000
- $215,000
Correct answer: $210,000
$200K × 1.05 = $210,000.
Question 2: A quality control chart shows a data point outside the control limits. This most likely indicates:
- A special cause variation requiring investigation (Correct answer)
- Normal random variation
- The control limits are set too wide
- The process is performing optimally
Correct answer: A special cause variation requiring investigation
Points outside control limits signal special cause variation, not routine randomness.
Question 3: A dataset has 200 survey responses. 35 are missing values for the 'age' field. What percentage of age data is missing?
- 17.5% (Correct answer)
- 15.0%
- 20.0%
- 12.5%
Correct answer: 17.5%
35 / 200 × 100 = 17.5% missing.
Question 4: Two products have the same average rating (4.2 stars), but Product A has a standard deviation of 0.3 and Product B has 1.8. What does this tell you?
- Product B has more inconsistent customer experiences (Correct answer)
- Product A is rated higher overall
- Standard deviation is not meaningful here
- Product B is more popular
Correct answer: Product B has more inconsistent customer experiences
A higher standard deviation means ratings are more spread out, indicating inconsistent customer experiences for Product B.
Question 5: A manager wants to compare regional performance but each region has a different headcount. Which metric is most appropriate?
- Revenue per employee (Correct answer)
- Total revenue
- Total headcount
- Number of transactions
Correct answer: Revenue per employee
Revenue per employee normalizes for headcount differences, enabling fair comparison across regions.
Question 6: A pie chart shows market share: Company A=45%, B=30%, C=15%, D=10%. A new entrant captures 5% of the market equally from all players. What is Company A's new share (approximately)?
- 42.75% (Correct answer)
- 40%
- 43.5%
- 44%
Correct answer: 42.75%
Each company loses proportionally; Company A loses 5% × 45% = 2.25%, giving 45% − 2.25% = 42.75%.
Question 7: You notice that ice cream sales and drowning incidents both peak in summer. The correct interpretation is:
- Both are driven by a common factor (hot weather/summer), not each other (Correct answer)
- Ice cream causes drowning
- Drowning risk increases ice cream demand
- The correlation is coincidental and meaningless
Correct answer: Both are driven by a common factor (hot weather/summer), not each other
This is a classic example of a confounding variable (summer/heat) creating spurious correlation between unrelated outcomes.
Virtual Job Tryout Data Analysis and Interpretation 5
A trend analysis shows revenue growing at roughly 5% per quarter.
If current revenue is $200K, what is the best estimate for next quarter?