The table presents the highway gasoline mileage performance and engine displacement for DaimlerChrysler vehicles for model year 2005 (U.S. Environmental protection Agency). Engine Displacement (in3) 215 201 196 226 226 348 226 348 148 226 122 215 215 148 500 348 165 148 148 500 148 MPG (highway) 30.8 32.5 35.4 28.1 24.4 24.1 28.5 24.2 32.8 28.0 41.3 30.0 28.2 34.1 18.7 20.3 35.1 37.9 33.8 25.9 26.4 (c) Find a 95% confidence interval for the mean highway gasoline mileage when the engine displacement is x = 159 in3. Round your answers to one decimal place (e.g. 98.7).   (d) Construct a 95% prediction interval on highway gasoline mileage when the engine displacement is x = 159 in3. Round your answers to one decimal place (e.g. 98.7).

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