Automite Company is an automobile replacement parts dealer in a large metropolitan community. Automite is preparing its sales forecast for the coming year. Data regarding both Automite’s and industry sales of replacement parts as well as both the used and new automobile sales in the community for the last 10 years have been accumulated. If Automite wants to determine whether its sales of replacement parts are dependent upon the industry sales of replacement parts or upon the sales of used and new automobiles, the company should employ