Question

Airlines have increasingly outsourced the maintenance of their planes to other companies. A concern voiced by critics is that the maintenance may be less carefully done so that outsourcing creates a safety hazard. In addition, flight delays are often due to maintenance problems, so one might look at government data on percent of major maintenance outsourced and percent of flight delays blamed on the airline to determine if these concerns are justified. This was done, and data from 2005 and 2006 appeared to justify the concerns of the critics. Do more recent data still support the concerns of the critics? Here are data from 2014:

Airline	Outsource percent	Delay percent	Airline	Outsource percent	Delay percent
Alaska	51.051.0	10.3510.35	Jet Blue	68.468.4	19.9319.93
American	29.429.4	20.3220.32	Southwest	58.258.2	28.4728.47
Delta	36.736.7	14.4814.48	United	52.652.6	23.4623.46
Frontier	46.346.3	21.4221.42	US Airways	54.354.3	13.6813.68
Hawaiian	78.478.4	5.065.06

Make a scatterplot with outsourcing percent as ?x and delay percent as ?.

Find the correlation ?r with and without Hawaiian Airlines. Enter your answers rounded to four decimal places.

Answer 1