# Question: Information describing 98 of the top automobile dealership groups in

Information describing 98 of the top automobile dealership groups in the United States is provided in computer database file DEALERS. For each group, the data include (1) total group revenue during 1999, (2) the number of retail vehicles sold that year, and (3) the number of dealerships in the group.

a. Determine the least-squares regression equation for y = total group revenue as a function of x1 = number of retail vehicles sold and x2 = number of dealers in the group. Interpret each of the partial regression coefficients.

b. At the 0.02 level, is the overall regression equation significant?

c. Use the 0.02 level in concluding whether each partial regression coefficient differs significantly from zero.

d. Construct a 98% confidence interval for each partial regression coefficient in the population regression equation.

a. Determine the least-squares regression equation for y = total group revenue as a function of x1 = number of retail vehicles sold and x2 = number of dealers in the group. Interpret each of the partial regression coefficients.

b. At the 0.02 level, is the overall regression equation significant?

c. Use the 0.02 level in concluding whether each partial regression coefficient differs significantly from zero.

d. Construct a 98% confidence interval for each partial regression coefficient in the population regression equation.

## Answer to relevant Questions

What role does the normal probability plot play in examining whether the multiple regression model is appropriate for a given set of data? For the regression equation obtained in Exercise 16.13, analyze the residuals by (a) Constructing a histogram, (b) Utilizing the normal probability plot, and (c) Plotting the residuals versus each of the independent ...For the regression equation in Exercise 16.47, the estimated number of persons swimming on a zero-degree weekday would be 100 persons. Since this level of pool attendance is unlikely on such a day, does this mean that an ...An admissions counselor, examining the usefulness of x1 = total SAT score and x2 = high school class rank in predicting y = freshman grade point average (GPA) at her university, has collected the sample data shown here and ...This case involves the variables shown here and described in data file SHOPPING. Information like that gained from this case could provide management with useful insights into how two or more variables (including dummy ...Post your question