Compute the value of the test statistic

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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 1.45 cups per day and 1.59 cups per day for those drinking decaffeinated coffee. A random sample of 51 regular-coffee drinkers showed a mean of 4.30 cups per day. A sample of 47 decaffeinated-coffee drinkers showed a mean of 4.89 cups per day.

Use the 0.01 significance level.

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

b. State the decision rule

c. Compute the value of the test statistic

d. What is the p-value?

e. What is your decision regarding Ho?

Reference no: EM132851695

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