A manufacturer claims that a particular automobile model will get 50 miles per gallon on the highway. The researchers at a consumer-oriented magazine believe that this claim is high and plan to test it with a simple random sample of 30 cars. Assuming the standard deviation between individual cars is 2.3 miles per gallon, what should the researchers conclude if the sample mean is 49 miles per gallon? In order to answer this research question, answer each of the following: What is the null and alternative hypothesis? Find the p-value (by calculating the appropriate test statistic). What is the conclusion?