1) (-28.084, 25.464) '1 2) (-3.3%, 0.776) 3) We only have the sample means, we need to know the population means in order to calculate a confidence interval. '1 4) (-5.544, 2.924) '3 5) (-5.398, 2.778) You are on the market for a new car. You want to check whether there is a significant difference between the fuel economy of mid-size domestic cars and mid-size import cars. You sample 20 domestic car makes and find an average fuel economy of 30.851 MPG with a standard deviation of 3.1563 MPG. For imports, you sample 17 cars and find an average MPG of 32.161 MPG with a standard deviation of 8.6963. Construct a 95% confidence interval for the difference between the true average fuel economies in question. Assume the difference will represent (domestic - import). You can also assume that the standard deviations are statistically the same between the two populations