A coffee manufacturer is interested in whether the mean dailyconsumption of regular- coffee drinkers is less than that ofdecaffeinated coffee drinkers. Assume the population standarddeviation for those drinking regular coffee is 1.21 cups per dayand 1.40 for those drinking decaffeinated coffee. A random sampleof 54 regular coffee drinkers showed a mean of 4.59 cups per day. Asample of 49 decaffeinated coffee drinkers showed a mean of 5.64cups per day.
a) Is this a One-tailed or Two-tailed test?
b) State the decision rule
c) Compute the value test statistic
d) What is the p-value
e) What is the decision (reject or do not reject)
