Question: 5.13 Outsourcing by Airlines. Exercise 4.5 (page 105) gives data for nine airlines on the percent of major maintenance outsourced and the percent of flight

5.13 Outsourcing by Airlines. Exercise 4.5 (page 105) gives data for nine airlines on the percent of major maintenance outsourced and the percent of flight delays blamed on the airline. AIRLINE

(a) Make a scatterplot with outsourcing percent as x and delay percent as y. Would you consider Hawaiian Airlines to be influential?

(b) Find the correlation r with and without Hawaiian Airlines. How influential is Hawaiian Airlines for correlation?

(c) Find the least-squares line for predicting y from x with and without Hawaiian Airlines. Draw both lines on your scatterplot. Use both lines to predict the percent of delays blamed on an airline that has outsourced 78.4% of its major maintenance. How influential is Hawaiian Airlines for the least-squares line?

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