| Exam Board | CAIE |
|---|---|
| Module | S2 (Statistics 2) |
| Year | 2018 |
| Session | November |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Central limit theorem |
1 The standard deviation of the heights of adult males is 7.2 cm . The mean height of a sample of 200 adult males is found to be 176 cm .\\
(i) Calculate a $97.5 \%$ confidence interval for the mean height of adult males.\\
(ii) State a necessary condition for the calculation in part (i) to be valid.\\
\hfill \mbox{\textit{CAIE S2 2018 Q1}}