Revelian Test Data Interpretation Skills 2 — Questions and Answers
Question 1: A bar chart shows monthly sales: Jan $12,000, Feb $15,000, Mar $9,000, Apr $18,000. What is the average monthly sales across these four months?
- $13,500 (Correct answer)
- $14,000
- $13,000
- $15,000
Correct answer: $13,500
Total = $54,000 divided by 4 months = $13,500.
Question 2: A pie chart shows department budgets: Operations 40%, Marketing 25%, R&D 20%, Admin 15%. If the total budget is $2,000,000, how much is allocated to Marketing?
- $500,000 (Correct answer)
- $400,000
- $450,000
- $600,000
Correct answer: $500,000
25% of $2,000,000 = 0.25 × $2,000,000 = $500,000.
Question 3: A line graph shows company revenue growing from $500K in Year 1 to $800K in Year 5. What is the overall percentage increase over the 5-year period?
- 60% (Correct answer)
- 50%
- 65%
- 55%
Correct answer: 60%
Increase = $300K; percentage = (300/500) × 100 = 60%.
Question 4: A table shows defect rates: Plant A 2.5%, Plant B 3.1%, Plant C 1.8%, Plant D 4.2%. Which plant has the lowest defect rate?
- Plant C (Correct answer)
- Plant A
- Plant B
- Plant D
Correct answer: Plant C
Plant C has the lowest defect rate at 1.8%.
Question 5: A scatter plot shows a strong positive correlation between advertising spend and sales. If a company increases ad spend by 20%, what is the most likely expected outcome?
- Sales will increase (Correct answer)
- Sales will decrease
- Sales will remain unchanged
- Cannot determine from a scatter plot
Correct answer: Sales will increase
A strong positive correlation means increases in ad spend are associated with increases in sales.
Question 6: A stacked bar chart shows total units sold in Q1: Product X = 300, Product Y = 450, Product Z = 250. What percentage of Q1 total sales did Product Y represent?
- 45% (Correct answer)
- 40%
- 50%
- 35%
Correct answer: 45%
Total = 1,000; Product Y share = 450/1,000 = 45%.
Question 7: A histogram shows the distribution of test scores with most scores clustered between 70–80, a few between 50–60, and very few above 90. What best describes this distribution?
- Negatively skewed (Correct answer)
- Positively skewed
- Symmetric
- Bimodal
Correct answer: Negatively skewed
A long left tail (low scores) indicates negative skew, pulling the mean below the mode.
Revelian Test Data Interpretation Skills 2
A bar chart shows monthly sales: Jan $12,000, Feb $15,000, Mar $9,000, Apr $18,000.
What is the average monthly sales across these four months?