I am trying to analyze the effectiveness of my sales force. The problem is that in addition to a salesperson’s effectiveness, the amount that a salesperson sells depends on the district to which he or she is assigned. How can I incorporate the district assignments of my sales-people into my analysis?
Based on a knowledge of sales rep and district, how can I forecast sales? How accurate are my sales forecasts?
How can I determine whether varying the price and the amount of advertising affects the sales of a video game? How can I determine whether price and advertising interact significantly?
How can I interpret the effects of price and advertising on sales when there is a significant interaction between ...