Reconsider question 50. This time, assume that the standard deviation is not known and that .5 oz is the sample standard deviation. Again construct a 99 %

confidence interval for the mean amount of coffee per cup. Compare your answer to your answer in question 50.

Question 50

A sample of 20 cups of coffee from a coffee machine has a mean amount of coffee of 6 oz. The standard deviation is known to be .5 oz. Construct a 99 %

confidence interval for the mean amount of coffee per cup.