In an article from the Journal of Statistics Education, Robin Lock describes a rich set of interesting data on selected attributes for a sample of 1993-model new cars. These data support a wide range of analyses. Indeed, the analysis possibilities are the subject of Lock's article. Here our interest is in comparing mean highway gas mileage figures among the six identified vehicle types- compact, small, midsize, large, sporty, and van.
Go to the Journal of Statistics Education Web archive and retrieve the 1993-cars data set and related documentation: www.amstat.org/publications/jse/archive.htm. Click on 93cars.dat for data, 93cars.txt for documentation, and article associated with this data set for a full text of the article. Excel and MINITAB data files may also be downloaded from this book's website. Construct box plots of Highway MPG by Vehicle Type (if MINITAB or other suitable statistical software is available). Describe any apparent differences in gas mileage by vehicle type. Conduct an analysis of variance to test for differences in mean gas mileage by vehicle type. Prepare a brief report of your analysis and conclusions.