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You have been assigned the task of making a multiple regression equation of at least three variables which describes Microsoft's annual sales.

Consider by using a time series of data of at least 10 years. You can search for this data by using the Internet.

Before running the regression, predict what sign each variable will be and describe why you make which prediction. After running the regression, interpret the regression. Does the regression fit the data well? Does each predictor play an important role in describing the importance of the regression? Are some predictors not helpful? If so, did you consider eliminating those and rerunning the regression? Are the predictors associated too significantly to one another?

Submit your answers in a three to four page Microsoft Word document.

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