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Regression analysis - sources and forecasting

What are examples in which regression analysis is used for forecasting?
What are some primary and secondary sources of data that may be used in correlation and regression analysis?

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Suppose we want to use the personal income to help us forecast auto-sales. Personal income is considered as a predictor of auto-sales, as the more income consumers have to spend, the more money they will tend to spend on automobiles. On the other hand, auto-sales is a strongly seasonal variable, whereas personal income is not. An ...

Solution Summary

An explanation as to the sources of data for regressions and how it can be used for forecasting