Provide a 95% confidence interval for overall quality for all sports and GT cars 1 answer below »

Provide a 95% confidence interval for overall quality for all sports and GT cars 1 answer below »

The Buyer’s Guide section of the Web site for Car and Driver magazine provides reviewsand road tests for cars, trucks, SUVs, and vans. The average ratings of overall quality, vehiclestyling, braking, handling, fuel economy, interior comfort, acceleration, dependability,fit and finish, transmission, and ride are summarized for each vehicle using a scale rangingfrom 1 (worst) to 10 (best). A portion of the data for 14 Sports/GT cars is shown here(Car and Driver website, January 7, 2004).Sports/GT Overall Handling Dependability Fit and FinishAcura 3.2CL 7.80 7.83 8.17 7.67Acura RSX 9.02 9.46 9.35 8.97Audi TT 9.00 9.58 8.74 9.38BMW 3-Series/M3 8.39 9.52 8.39 8.55Chevrolet Corvette 8.82 9.64 8.54 7.87Ford Mustang 8.34 8.85 8.70 7.34Honda Civic Si 8.92 9.31 9.50 7.93Infiniti G35 8.70 9.34 8.96 8.07Mazda RX-8 8.58 9.79 8.96 8.12Mini Cooper 8.76 10.00 8.69 8.33Mitsubishi Eclipse 8.17 8.95 8.25 7.36Nissan 350Z 8.07 9.35 7.56 8.21Porsche 911 9.55 9.91 8.86 9.55Toyota Celica 8.77 9.29 9.04 7.97a. Develop an estimated regression equation using handling, dependability, and fit andfinish to predict overall quality.b. Another Sports/GT car rated by Car and Driver is the Honda Accord. The ratings forhandling, dependability, and fit and finish for the Honda Accord were 8.28, 9.06, and8.07, respectively. Estimate the overall rating for this car.c. Provide a 95% confidence interval for overall quality for all sports and GT cars withthe characteristics listed in part (b).d. Provide a 95% prediction interval for overall quality for the Honda Accord describedin part (b).e. The overall rating reported by Car and Driver for the Honda Accord was 8.65. How doesthis rating compare to the estimates you developed in parts (b) and (d)?

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