1 The masses of a certain variety of plums are known to have standard deviation 13.2 g . A random sample of 200 of these plums is taken and the mean mass of the plums in the sample is found to be 62.3 g .
- Calculate a \(98 \%\) confidence interval for the population mean mass.
- State with a reason whether it was necessary to use the Central Limit theorem in the calculation in part (i).