Access the data file AIRPORT, which contains data for the number of minutes late that flights arrived at Chicago O'Hare Airport (Y), the number of minutes late that flights departed to Chicago (X1), the number of passengers (X2), whether the flight faced inclement weather

(X3), encoded with a “1” if it did, and miles in hundreds the departure airport was from Chicago (X4).

a. Use Excel, Minitab, or some similar software to estimate the model.

b. Comment on the significance of each RHS variable.

c. What are the two models that result, based on the dummy variable?

d. How many minutes late would a flight arrive in Chicago that was 7 minutes late departing for Chicago, had 95 passengers on board, incurred bad weather, and was 530 miles from Chicago?

e. How many minutes would the arrival time in Chicago vary from the designated time if a flight that left for Chicago 5 minutes late had 75 passengers, encountered no bad weather, and had to fly 730 miles?