Question
A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers is less than that of decaffeinated-coffee drinkers. Assume the population standard
A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers is less than that of decaffeinated-coffee drinkers. Assume the population standard deviation for those drinking regular coffee is 1.33 cups per day and 1.43 cups per day for those drinking decaffeinated coffee. A random sample of 49 regular-coffee drinkers showed a mean of 4.55 cups per day. A sample of 45 decaffeinated-coffee drinkers showed a mean of 5.70 cups per day.
Use the 0.10 significance level.
State the decision rule_________
Compute the value of the test statistic___________
What is thep-value?___________
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