A coffee manufacturer is interested in weather the mean daily consumption of regular coffee drinkers is less than that of decaffeinated-coffee drinkers. Assume the population standard deviation for those drinking coffee is 1.36 cups per day and 1.56 cups per day for those drinking decaffeinated coffee. A random sample of 48 regular-coffee drinkers showed a mean of 4.47 cups per day. A sample of 43 decaffeinated-coffee drinkers showed a mean of 5-56 cups per day.

Use the 0.01 significance level.

A. Is this a one-tailed or two tailed test?

B. State the decision rule (Negative amount should be indicated by the minus sign. Round your answer to 3 decimal places)

C. Compute the value of the test statistics (Negative amount should be indicated by the minus sign. Round your answer to 2 decimal places.

D. What is the p-value?

E. What is your decision regarding H0?