Data Interpretation Skills Flashcards

A bar chart shows monthly sales: Jan=$40K, Feb=$55K, Mar=$35K, Apr=$60K. What is the average monthly sales over these four months?

Answer: $47,500

Average = (40+55+35+60)/4 = 190/4 = $47,500.

A pie chart shows market share: Company A=45%, B=30%, C=15%, D=10%. If total market revenue is $2M, how much did Company B earn?

Answer: $600,000

Company B's revenue = 30% × $2,000,000 = $600,000.

A line graph shows a company's profit trend: 2020=$10M, 2021=$12M, 2022=$9M, 2023=$15M. Which year had the steepest year-over-year increase?

Answer: 2022 to 2023

2022 to 2023 saw a $6M increase, the largest single-year jump in the data.

A table shows product defects per 1,000 units: Line A=8, Line B=5, Line C=12, Line D=3. What percentage of total defects come from Line C?

Answer: 37.5%

Total defects = 8+5+12+3 = 28; Line C share = 12/28 = 42.9%.

A scatter plot shows a strong positive correlation between advertising spend and sales. Which conclusion is most valid?

Answer: Advertising spend and sales tend to increase together

A positive correlation means the two variables tend to move in the same direction, but correlation does not imply causation.

A histogram shows employee ages grouped in 10-year bins: 20-29=15, 30-39=40, 40-49=30, 50-59=15. What proportion of employees are in their 30s?

Answer: 40%

Total employees = 100; employees in 30-39 = 40, so 40/100 = 40%.

A table compares Q1 and Q2 revenue for three regions: North ($500K→$600K), South ($300K→$270K), East ($400K→$440K). Which region had the highest percentage growth?

Answer: North

North grew 20%, East grew 10%, and South declined 10%, making North the highest growth region.