| Exam Board | Edexcel |
|---|---|
| Module | S2 (Statistics 2) |
| Marks | 6 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Permutations & Arrangements |
| Type | Basic arrangements with repeated letters |
| Difficulty | Easy -1.8 This is a purely definitional question requiring only recall of basic statistical terminology and straightforward application of when to use census vs sample. No calculations, problem-solving, or mathematical reasoning required—students simply need to state textbook definitions and give common-sense justifications for survey methods. |
| Spec | 2.01a Population and sample: terminology |
| Answer | Marks | Guidance |
|---|---|---|
| (a)(i) | e.g. all individuals or items of relevance | B1 |
| (a)(ii) | e.g. a selection of individuals or items from a population | B1 |
| (b)(i) | census – e.g. need to know requirements of all for catering | B2 |
| (b)(ii) | sample – e.g. testing is destructive, none left after census | B2 |
(a)(i) | e.g. all individuals or items of relevance | B1 |
(a)(ii) | e.g. a selection of individuals or items from a population | B1 |
(b)(i) | census – e.g. need to know requirements of all for catering | B2 |
(b)(ii) | sample – e.g. testing is destructive, none left after census | B2 | (6)\begin{enumerate}[label=(\alph*)]
\item Explain briefly what you understand by the terms
\begin{enumerate}[label=(\roman*)]
\item population,
\item sample.
\end{enumerate}
[2 marks]
\item Giving a reason for each of your answers, state whether you would use a census or a sample survey to investigate
\begin{enumerate}[label=(\roman*)]
\item the dietary requirements of people attending a 4-day residential course,
\item the lifetime of a particular type of battery.
\end{enumerate}
[4 marks]
\end{enumerate}
\hfill \mbox{\textit{Edexcel S2 Q1 [6]}}