Assume you are working at the Consumer Protection Agency. Recently, you have been getting complaints about the highway gas mileage of a new minivan. The car company agrees to allow you to select randomly 40 of its new minivans to test their highway mileage. The company claims that its minivans get 28 miles per gallon on the highway. Your results show a mean of 26.7 and a standard deviaTon of 4.2. You are not certain if you should create a conFdence interval or run a hypothesis test. You decide to do both at the same Tme. You run a one-tail test, two-tail test, and a conFdence interval. You decide to accept an alpha risk of 0.05.