| Exam Board | AQA |
|---|
| Module | Further Paper 3 Statistics (Further Paper 3 Statistics) |
|---|
| Year | 2023 |
|---|
| Session | June |
|---|
| Topic | Linear combinations of normal random variables |
|---|
| Type | Known variance confidence interval |
|---|
3 The masses of tins of a particular brand of spaghetti are normally distributed with mean \(\mu\) grams and standard deviation 4.1 grams.
A random sample of 11 tins of spaghetti has a mean mass of 401.8 grams.
Construct a \(98 \%\) confidence interval for \(\mu\), giving your values to one decimal place.