| Exam Board | Edexcel |
|---|---|
| Module | S2 (Statistics 2) |
| Session | Specimen |
| Marks | 5 |
| Paper | Download PDF ↗ |
| Topic | Central limit theorem |
| Type | Sampling distribution theory |
| Difficulty | Easy -1.8 This is a pure definitional question requiring only recall of basic statistical terminology (population, statistic, sampling distribution) with no calculations or problem-solving. The context application in parts (c)-(d) is straightforward identification. This is significantly easier than typical A-level questions which require applying techniques. |
| Spec | 2.01a Population and sample: terminology5.01a Permutations and combinations: evaluate probabilities |
\begin{enumerate}
\item Explain what you understand by\\
(a) a population,\\
(b) a statistic.
\end{enumerate}
A researcher took a sample of 100 voters from a certain town and asked them who they would vote for in an election. The proportion who said they would vote for Dr Smith was $35 \%$.\\
(c) State the population and the statistic in this case.\\
(d) Explain what you understand by the sampling distribution of this statistic.\\
\hfill \mbox{\textit{Edexcel S2 Q1 [5]}}