9231 P41 - Nov 2025 - Q1 - 6 marks
6601
A group of 10 school children are asked to estimate the size of an angle \(\theta^{\circ}\) in a given acute angled triangle. These estimates, in degrees, are as follows.
| \(84\) | \(85\) | \(77\) | \(85\) | \(84\) | \(87\) | \(86\) | \(88\) | \(83\) | \(85\) |
(a) Stating any assumptions you make, calculate a \(95\%\) confidence interval for \(\theta\).
(b) Give a reason why the assumptions made in part (a) may not be appropriate in this case.
Solutions locked. Please sign in with access to view them.