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1. Why learn linear regression model?
In scientific research and engineering practice, we often encounter the "black box problem", that is, the internal mechanism of the system is not clear, and a mathematical model needs to be established. Through observation data, the internal laws of the system are constructed to achieve the goal of predicting and controlling the output of the system.
such as:
- In econometrics, it is necessary to judge whether the government's “alcohol consumption tax” will help reduce the number of traffic accidents.
- In psychology, it is necessary to find various factors that determine the effect of learning
- In mathematics, it is necessary to establish the functional relationship y=f(x) between the dependent variable y and the independent variable x, that is, to determine the form of the function f(x).