| Exam Board | AQA |
|---|---|
| Module | Paper 3 (Paper 3) |
| Year | 2018 |
| Session | June |
| Marks | 3 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Measures of Location and Spread |
| Type | Evaluate claims about large data set |
| Difficulty | Easy -1.8 This question requires only recall of how the Large Data Set handles rounding (values rounded to nearest whole number can appear as 0 but still change). No calculation or problem-solving is needed—just knowledge that 0 represents '<0.5' and explaining how percentage change can occur between two rounded zeros. This is pure data set knowledge recall with minimal mathematical reasoning. |
| Spec | 2.01a Population and sample: terminology |
| Year | 2011 | 2012 | 2013 | 2014 | \% change since 2011 |
| Other takeaway food brought home | 0 | 0 | 0 | 0 | \(-29\) |
| Answer | Marks |
|---|---|
| 13 | Explains that the actual recorded |
| Answer | Marks | Guidance |
|---|---|---|
| (could be implied) OE | AO2.4 | E1 |
| Answer | Marks | Guidance |
|---|---|---|
| (could be implied) OE | AO2.4 | E1 |
| Answer | Marks | Guidance |
|---|---|---|
| incorrect | AO2.2a | R1 |
| Total | 3 | |
| Q | Marking Instructions | AO |
Question 13:
13 | Explains that the actual recorded
values for ‘Other takeaway food
brought home’ are non-zero but
have been rounded to the nearest
whole number with reference to
knowledge of the Large Data Set
(could be implied) OE | AO2.4 | E1 | The values in the table are rounded
to the nearest whole number so are
actually non zero
They are available to a large
number of decimal places in the
data set, which, if used, would
show that the -29% is correct
Hence Sarah’s claim is incorrect
Explains that if unrounded numbers
were used then the change could
be calculated with reference to
knowledge of the Large Data Set
(could be implied) OE | AO2.4 | E1
Deduces that Sarah’s claim is
incorrect | AO2.2a | R1
Total | 3
Q | Marking Instructions | AO | Marks | Typical SolutionThe table below shows an extract from the Large Data Set.
\begin{tabular}{|c|c|c|c|c|c|}
\hline
Year & 2011 & 2012 & 2013 & 2014 & \% change since 2011 \\
\hline
Other takeaway food brought home & 0 & 0 & 0 & 0 & $-29$ \\
\hline
\end{tabular}
Sarah claims that the $-29\%$ change since 2011 is incorrect, as there is no change between 2011 and 2014.
Using your knowledge of the Large Data Set to justify your answer, explain whether Sarah's claim is correct.
[3 marks]
\hfill \mbox{\textit{AQA Paper 3 2018 Q13 [3]}}