Question

GSK Pharmaceuticals wish to ensure that their Paracetamol tablets contain, on average, the amount quoted on the packet of their product - namely 500 mg. Clinical tests on a random sample of 66 tablets yielded an average of 499.34 mg of Paracetamol per tablet. If it can be assumed,on the basis of previous trials, that the standard deviation of is 5.7 mg, construct a 99.5% confidence interval for the average amount of Paracetamol. State only the upper limit of this interval correct to two decimal places.

Answer 1