Data interpretation practice
Work through rate, chart and comparison problems using transparent calculations.
What you will learn
- Apply quantitative and data literacy to unfamiliar scenarios.
- Explain a conclusion using relevant evidence and constraints.
- Compare your reasoning with structured answer guidance.
This untimed practice set develops quantitative and data literacy. Write a brief reason before opening the guidance. These activities teach transferable reasoning and are not live assessment items.
Practice activities
Applications rise from 800 to 920. What is the absolute and relative increase?
Review answer guidance
The absolute increase is 120. The relative increase is 120 ÷ 800 = 15%. State the original denominator.
A dashboard reports a 50% fall in errors, from two per month to one. What context is needed?
Review answer guidance
Report the small absolute counts, the number of transactions, the observation period and ordinary variation. The relative reduction is correct but may be unstable.
One programme has a 90% success rate among 20 participants; another has 82% among 500. Can the first be declared better?
Review answer guidance
Not from the rates alone. Account for sample size, participant selection, uncertainty, programme difficulty and the definition of success.