Writing Hypotheses: Refrigerator Manufacturer A refrigerator manufacturer claims that the mean life of its competitor’s refrigerators is less than 15 years. You are asked to perform a hypothesis test...

Writing Hypotheses: Refrigerator Manufacturer A refrigerator manufacturer claims that the mean life of its competitor’s refrigerators is less than 15 years. You are asked to perform a hypothesis test to test this claim. How would you write the null and alternative hypotheses when

(a) you represent the manufacturer and want to support the claim?

(b) you represent the competitor and want to reject the claim?