Question

A marketing researcher decides to test whether coffee drinkers have a favorable view of coffee labeled as “Fair Trade.” He has 15 randomly selected coffee drinkers taste his company’s Morning Blend, then the exact same coffee labeled Fair Trade Blend. They are asked to rate the coffees on a 1 to 10 scale, 10 being best. The data is recorded in Minitab and a statistical test is done at α = 0.05 to determine if “Fair Trade” coffee is rated more highly.
a.) What is the correct hypothesis test for testing this data?
b.) What condition(s), if any, are necessary for the test to be valid?
c.) What are the hypotheses for this test?