| Exam Board | OCR |
|---|---|
| Module | PURE |
| Marks | 4 |
| Paper | Download PDF ↗ |
| Topic | Bivariate data |
| Type | Interpret census or real-world data |
| Difficulty | Easy -2.3 This is a data interpretation question requiring only basic vocabulary (positive/negative correlation) and simple contextual reasoning about census data. No mathematical calculation or A-level techniques are needed—just reading graphs and providing common-sense explanations. This is well below typical A-level maths standard. |
| Spec | 2.02d Informal interpretation of correlation2.02e Correlation does not imply causation |
This question deals with information about the populations of Local Authorities (LAs) in the North of England, taken from the 2011 census.
\includegraphics{figure_6}
Fig. 1 and Fig. 2 both show strong correlation, but of two different kinds.
\begin{enumerate}[label=(\alph*)]
\item For each diagram, use a single word to describe the kind of correlation shown. [1]
\item For each diagram, suggest a reason, in context, why the correlation is of the particular kind described in part (a). [2]
\end{enumerate}
Fig. 3 is the same as Fig. 2 but with the point $A$ marked.
Fig. 4 shows information about the same LAs as Fig. 2 and Fig. 3.
\includegraphics{figure_7}
\begin{enumerate}[label=(\alph*)]
\setcounter{enumii}{2}
\item Point $A$ in Fig. 3 and point $B$ in Fig. 4 represent the same LA.
Explain how you can tell that this LA has a large population. [1]
\end{enumerate}
\hfill \mbox{\textit{OCR PURE Q12 [4]}}