Question 8 (1 point) 3 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 6 cars. You sample 21 domestic car makes and find an average fuel economy of 30.227 MPG with a standard deviation of 5.3683 MPG. For imports, you sample 12 cars and find an average MPG of 32.146 MPG with a standard deviation of 8.4277. Construct 8 9 a 99% 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. ( 1) We only have the sample means, we need to know the population means in order to calculate a confidence interval. O 2) (-4.314, 0.476) O 3) (-45.408, 41.57 ) ( 4 ) (-8.49, 4.652 ) ( 5) (-8.088, 4.25 )