| Exam Board | OCR |
|---|---|
| Module | PURE |
| Marks | 2 |
| Paper | Download PDF ↗ |
| Topic | Measures of Location and Spread |
| Type | Describing sampling methods |
| Difficulty | Easy -2.0 This is a basic statistics question testing understanding of sampling methods and generalization. It requires only recall of standard definitions (advantages of stratified sampling) and basic reasoning about sample representativeness. No calculations or mathematical techniques are needed—just straightforward conceptual knowledge that would be covered early in a statistics module. |
| Spec | 2.01c Sampling techniques: simple random, opportunity, etc2.01d Select/critique sampling: in context |
Jo is investigating the popularity of a certain band amongst students at her school. She decides to survey a sample of 100 students.
\begin{enumerate}[label=(\roman*)]
\item State an advantage of using a stratified sample rather than a simple random sample. [1]
\item Explain whether it would be reasonable for Jo to use her results to draw conclusions about all students in the UK. [1]
\end{enumerate}
\hfill \mbox{\textit{OCR PURE Q9 [2]}}