Family transportation costs are usually higher than most people believe because those costs include car

payments, insurance, fuel costs, repairs, parking, and public transportation. Twenty randomly selected

families in four major cities are asked to use their records to estimate a monthly figure for transportation

cost$.$ Test whether there is a significant difference in monthly transportation costs for families living in

these cities. Assume that $=\mathrm{.}05.$ Discuss the business implications of your findings.