| Exam Board | OCR MEI |
|---|---|
| Module | AS Paper 2 (AS Paper 2) |
| Year | 2021 |
| Session | November |
| Marks | 2 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Data representation |
| Type | Describe shape or skewness of distribution |
| Difficulty | Easy -1.8 This is a very straightforward descriptive statistics question requiring only basic vocabulary (e.g., 'uniform', 'symmetrical') with no calculations. Part (a) asks students to describe what they see in a chart, and part (b) tests understanding that a fair die produces a uniform distribution with larger samples—both are fundamental recall-level concepts from AS statistics. |
| Spec | 2.02a Interpret single variable data: tables and diagrams |
| Answer | Marks | Guidance |
|---|---|---|
| Positive skew | B1 | Oe |
| Answer | Marks | Guidance |
|---|---|---|
| (discrete) uniform | B1 | Oe |
**Question 2(a):**
Positive skew | B1 | Oe
**[1]**
---
**Question 2(b):**
(discrete) uniform | B1 | Oe
**[1]**
---2 Mia rolls a six-sided die 24 times and records the scores. She displays her results in a vertical line chart. This is shown in Fig. 2.1.
\begin{figure}[h]
\begin{center}
\includegraphics[alt={},max width=\textwidth]{2b9ce212-84e2-4817-be94-98e2adff12a3-03_534_1168_648_242}
\captionsetup{labelformat=empty}
\caption{Fig. 2.1}
\end{center}
\end{figure}
\begin{enumerate}[label=(\alph*)]
\item Describe the shape of the distribution.
She repeats the experiment, but this time she rolls the die 50 times. Her results are displayed in Fig. 2.2.
\begin{figure}[h]
\begin{center}
\captionsetup{labelformat=empty}
\caption{Scores on a six-sided die}
\includegraphics[alt={},max width=\textwidth]{2b9ce212-84e2-4817-be94-98e2adff12a3-03_476_1161_1617_242}
\end{center}
\end{figure}
Fig. 2.2
Her brother Kai rolls the same die 1000 times and displays his results in a similar diagram.
\item Assuming the die is fair, describe the distribution you would expect to see in Kai's diagram.
\end{enumerate}
\hfill \mbox{\textit{OCR MEI AS Paper 2 2021 Q2 [2]}}