Under the same context of Question 10. Suppose we are interested in predicting mean highway gasoline mileage when the engine displacement is xo = 150. What is the 95% confidence interval about mean response at the value of xo? O [29.74, 36.51] [30.90, 35.35] O [31.28, 34.96] O [32.34, 33.91] O None of the above is correct\fA regression between highway gasoline mileage performance and engine displacement for Daimler Chrysler vehicles for model year 2005 resulted in the following regression equation: y = 39.1555 - 0.0402 x We know n=21, Sxx -238151.81, _ x; = 5017, x = 238.90, 62 = 14. What is the 95% confidence interval on the slope of the regression line? TABLE V Percentage Points a of the t Distribution .40 25 10 05 025 .01 005 0025 .001 0005 325 1.000 3.078 6.314 12.706 31.821 63.657 127.32 318.31 636.62 289 .816 1.886 2.920 4.303 6.965 9.925 14.089 23.326 31.598 453 10.213 12.924