| Exam Board | Edexcel |
|---|---|
| Module | S2 (Statistics 2) |
| Marks | 4 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Modelling and Hypothesis Testing |
| Type | Statistical modeling theory |
| Difficulty | Easy -1.8 This is a purely definitional question requiring only recall of basic hypothesis testing concepts with no calculation or problem-solving. Students need only state standard textbook definitions and identify an obvious one-tailed scenario, making it significantly easier than typical A-level questions. |
| Spec | 5.05c Hypothesis test: normal distribution for population mean |
| Answer | Marks | Guidance |
|---|---|---|
| (a) One-tailed: is a parameter greater (or less) than a given value? | B1 | |
| One-tailed: is a parameter different from a given value? | B1 | |
| (b) One-tailed, as testing for 'warmer' rather than 'different' | B1 B1 | Total: 4 |
(a) One-tailed: is a parameter greater (or less) than a given value? | B1 |
One-tailed: is a parameter different from a given value? | B1 |
(b) One-tailed, as testing for 'warmer' rather than 'different' | B1 B1 | **Total: 4**
---\begin{enumerate}[label=(\alph*)]
\item Briefly explain the difference between a one-tailed test and a two-tailed test. [2 marks]
\item State, with a reason, which type of test would be more appropriate to test the claim that this decade's average temperature is greater than the last decade's. [2 marks]
\end{enumerate}
\hfill \mbox{\textit{Edexcel S2 Q1 [4]}}