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A coffee manufacturer is interested in whether the mean daily consumption of regular- coffee drinkers is...

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Statistics

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)

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