Question: A consumer advocate group would like to disprove a car manufacturer's claim that a specific model will average 24 miles per gallon of gasoline. Specifically, the group would like to show that the mean miles per gallon is considerably lower than 24 miles per gallon. The group took a random sample of 30 cars and obtained a sample mean of 22.5 mpg . Assume a = 2.9. Let alpha = 0.05.

(a) State the null an alternative hypotheses.

(b) Perform the test of significance.

(c) Give the p-value.

d.) State your conclusion