Chapter 15, Problem 40PS

The file Cites contains a sample of 25 cities in the United States. Variables included are city average salary $\text{(\$),}$ Unemployment rate $\text{(\%),}$ median home value $\text{(\$thousands),}$ numbers of violent crime per 100,000 residents, average commuter travel time (minutes), and liability score, a rating on a scale of 0 to 100 that rates the overall liability of the city.

Develop the most appropriate multiple regression model to predict average annual salary $\text{(\$)}\text{.}$ Be sure to perform a thorough residual analysis and provide a detailed explanation of the results as part of your answer.