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Outsourcing by airlines Airlines have increasingly outsourced the maintenance of their planes to other companies. Critics say that the maintenance may be less carefully done, so that outsourcing creates a safety hazard. As evidence, they point to government data on percent of major maintenance outsourced and percent of flight delays blamed on the airline (often due to maintenance problems): Make a scatterplot by hand that shows how delays relate to outsourcing.

(a) Describe the direction, form, and strength of the relationship between maintenance outsourcing and delays blamed on the airline.

(b) One airline is a high outlier in delay percent. Which airline is this? Aside from the outlier, does the plot show a roughly linear form? Is the relationship very strong?

Step by step solution

01

Part(a) Step 1: Given Information 

From Exercise, $5$we get graph as

02

Part(a) Step 2: Explanation 

Direction: Because the scatterplot slopes upwards, it is positive.

Form: Because the scatterplot has curvature, it is curved.

Strength: Weak, because the points lie far apart.

03

Part(b) Step 1: Given Information 

From Exercise, $5$we get graph as

04

Part(b) Step 2: Explanation 

The point that lies horizontally far apart from the rest of the data points is the high outlier in delay percent. This outlier has coordinates $(80,70)$which correspond with Hawaiian Airlines.

Because the lines are generally on a line, the plot reveals a fairly linear pattern. (when ignoring the outlier).

Because the points are so far away, the relationship isn't particularly strong.

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