Question: Question 14: A manufacturer of a car claims that the average gas mileage of their car model is 47 mpg. To test their claim a researcher selected a random sample of 50 cars of the same model and found that the average gas mileage for the sample was 3? = 44 mpg with a standard deviation of s = 4.2 mpg.

(a) On the basis of this information, can the researcher conclude at a = 0.05 level of significance that the average gas mileage of the car is not 47 mpg?

(b) What is the p-value?