# Question: Repeat Exercise 17 17 using the data in file XR17017 but

Repeat Exercise 17.17, using the data in file XR17017, but with y = total operating revenue (millions of dollars), x1 = number of aircraft, and x2 = number of employees.

Repeat exercise

The Air Transport Association has reported the following kinds of information describing 23 individual U.S. airlines: total operating revenue, number of aircraft, number of employees, and number of aircraft departures. Using data file XR17017, with y = total operating revenue (millions of dollars), x1 = number of employees, and x2 = number of aircraft departures:

a. Fit a first-order model of the form E(y) = β0 + β1x1 + β2x2. Interpret the R2 value for the model and indicate whether, at the 0.01 level, the model is significant.

b. Repeat part (a), but with an interaction term included. Interpreting the R2 value, to what extent has inclusion of the interaction term improved the model’s explanatory power?

Repeat exercise

The Air Transport Association has reported the following kinds of information describing 23 individual U.S. airlines: total operating revenue, number of aircraft, number of employees, and number of aircraft departures. Using data file XR17017, with y = total operating revenue (millions of dollars), x1 = number of employees, and x2 = number of aircraft departures:

a. Fit a first-order model of the form E(y) = β0 + β1x1 + β2x2. Interpret the R2 value for the model and indicate whether, at the 0.01 level, the model is significant.

b. Repeat part (a), but with an interaction term included. Interpreting the R2 value, to what extent has inclusion of the interaction term improved the model’s explanatory power?

**View Solution:**## Answer to relevant Questions

For the Car and Driver information described in Exercise 17.9, it would seem reasonable that the number of seconds required to accelerate to 60 mph would depend on both a car’s weight and its horsepower. Further, it would ...Data to be used in a linear regression analysis involving clients of an investment counselor include information regarding the risk level each client has specified: low, medium, or high. Determine the number of qualitative ...As x increases, y decreases, and at an increasing rate. If a second-order polynomial model were fitted to the scatterplot of the data, what would be the signs of the partial regression coefficients in the model? One of the indicators that multicollinearity is present is when a variable that is known to be an important predictor ends up having a partial regression coefficient that is not significant. What are some of the other ...The following Minitab printout is for a stepwise regression with 10 independent variables and 50 observations: a. List the order in which the independent variables have been introduced. b. What is the multiple regression ...Post your question