| Exam Board | AQA |
|---|---|
| Module | AS Paper 2 (AS Paper 2) |
| Year | 2021 |
| Session | June |
| Marks | 3 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Bivariate data |
| Type | Identify outliers or unusual points |
| Difficulty | Easy -1.8 This is a very straightforward data interpretation question requiring only visual identification of an outlier from a scatter diagram and basic understanding that correlation doesn't imply causation. No calculations, statistical knowledge beyond GCSE level, or problem-solving required—purely observational skills. |
| Spec | 2.02c Scatter diagrams and regression lines2.02d Informal interpretation of correlation2.02e Correlation does not imply causation2.02i Select/critique data presentation |
| Answer | Marks | Guidance |
|---|---|---|
| Answer/Working | Marks | Guidance |
| F | B1 (2.2a) |
| Answer | Marks | Guidance |
|---|---|---|
| Answer/Working | Marks | Guidance |
| Remove the point from the set of data | E1 (2.4) | States appropriate action to deal with error |
| Answer | Marks | Guidance |
|---|---|---|
| Answer/Working | Marks | Guidance |
| The claim is invalid because correlation does not imply causality | E1 (2.4) | Must indicate scatter diagram does not imply causality, or identify counter example from data |
## Question 15(a)(i):
| Answer/Working | Marks | Guidance |
|---|---|---|
| F | B1 (2.2a) | |
## Question 15(a)(ii):
| Answer/Working | Marks | Guidance |
|---|---|---|
| Remove the point from the set of data | E1 (2.4) | States appropriate action to deal with error |
## Question 15(b):
| Answer/Working | Marks | Guidance |
|---|---|---|
| The claim is invalid because correlation does not imply causality | E1 (2.4) | Must indicate scatter diagram does not imply causality, or identify counter example from data |15\\
The number of hours of sunshine and the daily maximum temperature were recorded over a 9-day period in June at an English seaside town.
A scatter diagram representing the recorded data is shown below.\\
\includegraphics[max width=\textwidth, alt={}, center]{f87d1b36-26db-4a0b-b9ec-d7d82a396aba-20_872_1511_488_264}
One of the points on the scatter diagram is an error.
15
\begin{enumerate}[label=(\alph*)]
\item (i) Write down the letter that identifies this point.\\
15 (a) (ii) Suggest one possible action that could be taken to deal with this error.\\
15
\item It is claimed that the scatter diagram proves that longer hours of sunshine cause\\
higher maximum daily temperatures.
Comment on the validity of this claim.\\[0pt]
[1 mark]
\end{enumerate}
\hfill \mbox{\textit{AQA AS Paper 2 2021 Q15 [3]}}