A consumer research group is interested in testing an automobile manufacturer 's claim that a new economy model will travel at least 25 miles per gallon of gasoline (H0 25) a With a 02 level of significance and a sample of 30 cars, what is the rejection rule based on the value of for the test to determine whether the manufacturer 's claim should be rejected Assume that is 3 miles per gallon b What is the probability of committing a Type II error if the actual mileage is 23 miles per gallon c What is the probability of committing a Type II error if the actual mileage is 24 miles per gallon d What is the probability of committing a Type II error if the actual mileage is 25 5 miles per gallon

Question: A consumer research group is interested in testing an automobile manufacturer's claim that a new economy model will travel at least 25 miles per gallon

A consumer research group is interested in testing an automobile manufacturer's claim that a new economy model will travel at least 25 miles per gallon of gasoline (H0: μ > 25).
a. With a .02 level of significance and a sample of 30 cars, what is the rejection rule based on the value of for the test to determine whether the manufacturer's claim should be rejected? Assume that σ is 3 miles per gallon.
b. What is the probability of committing a Type II error if the actual mileage is 23 miles per gallon?
c. What is the probability of committing a Type II error if the actual mileage is 24 miles per gallon?
d. What is the probability of committing a Type II error if the actual mileage is 25.5 miles per gallon?

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