Data Interpretation Skills Flashcards

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?

Answer: $13,500

Total = $54,000 divided by 4 months = $13,500.

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?

Answer: $500,000

25% of $2,000,000 = 0.25 × $2,000,000 = $500,000.

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?

Answer: 60%

Increase = $300K; percentage = (300/500) × 100 = 60%.

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?

Answer: Plant C

Plant C has the lowest defect rate at 1.8%.

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?

Answer: Sales will increase

A strong positive correlation means increases in ad spend are associated with increases in sales.

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?

Answer: 45%

Total = 1,000; Product Y share = 450/1,000 = 45%.

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?

Answer: Negatively skewed

A long left tail (low scores) indicates negative skew, pulling the mean below the mode.