Chapter 3.1, Problem 5E

To determine

To make:a scatterplot which showsthe relation of delays to outsourcing

Answer to Problem 5E

The result is:

  

Explanation of Solution

Given:

Airline	Outsource percent	Delay percent
AirTran	$66$	$14$
Alaska	$92$	$42$
American	$46$	$26$
America West	$76$	$39$
ATA	$18$	$19$
Continental	$69$	$20$
delta	$48$	$26$
Hawaiian	$80$	$70$
JetBlue	$68$	$18$
Northwest	$76$	$43$
Southwest	$68$	$20$
United	$63$	$27$
US Airways	$77$	$24$

Calculation:

We put outsource percent (the explanatory variable) on the horizontal axis and delay percent (the response variable) on the vertical axis. Figure $5.1$ is our completed scatterplot.

  

From the scatter plot, we can conclude that there is positive correlation exists between percent of major maintenance outsourced and percent of flight delays blamed on the airline. So, we reject the critics claim and we can conclude that the Airlines have increasingly outsourced the maintenance of their planes to other companies.

Conclusion:

Therefore, the scatterplot is drawn.