1. Milk cartons are advertised to contain one litre of milk. From a randomly sample of 18 one-litre cartons whose contents were accurately measured by the South African Bureau of Standards (SABS), it was found that the average fill was 0.98 litres with a samplestandard deviation of 0.052 litres.Assume that the fill of one-litre milk cartons is normally distributed.
2. 1. Using a 99% confidence level,estimate the actualmean fill of all one-litre milk cartons. Interpret your findings and comment on the question (4)
   2. Repeat the exercise in (i) above, but use 90% confidence level. (4)
   3. Explain any differences in the findingscomputed above. (2)