| Exam Board | CAIE |
|---|---|
| Module | S2 (Statistics 2) |
| Year | 2020 |
| Session | June |
| Marks | 6 |
| Paper | Download PDF ↗ |
| Topic | T-tests (unknown variance) |
| Type | Single sample confidence interval t-distribution |
| Difficulty | Moderate -0.5 This is a straightforward hypothesis test question requiring calculation of sample mean and standard deviation from raw data, then performing a standard normal distribution test. While it involves multiple steps, it's a routine application of well-practiced techniques with no conceptual challenges or novel problem-solving required, making it slightly easier than average. |
| Spec | 2.02f Measures of average and spread2.02g Calculate mean and standard deviation |
1 The lengths, $X$ centimetres, of a random sample of 7 leaves from a certain variety of tree are as follows.\\
3.9\\
4.8\\
4.8\\
4.4\\
\hfill \mbox{\textit{CAIE S2 2020 Q1 [6]}}