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Chapter 15. Using Regression to Track Tr... > Analyzing the Sales Versus Advertisi...

Analyzing the Sales Versus Advertising Trend

We tend to think of trend analysis as having a time component. That is, when we think about looking for a trend, we usually think about finding a pattern over a period of time. But regression analysis is more versatile than that. You can use it to compare any two phenomena, as long as one is dependent on the other in some way.

For example, it's reasonable to assume that there is some relationship between how much you spend on advertising and how much you sell. In this case, the advertising costs are the independent variable and the sales revenues are the dependent variable. We can apply regression analysis to investigate the exact nature of the relationship.


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