You Are Working with the Data Scientist from Your Sales

Multiple Choice

You are working with the data scientist from your sales department to develop a regression model for forecasting your company's sales based on changes in the U.S.economy. ​
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Which of the following types of data do you need the most in order to enhance the accuracy of the model's forecasts?​

A) ​qualitative data about the department's sales force
B) ​qualitative data about your marketing environment
C) ​quantitative data about your company's historical sales
D) ​qualitative data about your company's historical sales and U.S. economic performance statistics
E) ​quantitative data about your company's historical sales and U.S. economic performance statistics