Regression analysis is a statistical process of studying the relationship between a set of independent variables (explanatory variables) and the dependent variable (response variable). Through this technique, it is possible to understand how the value of the response variable changes when the explanatory variable is varied.
Consider a group of bikers about which some information has been collected: number of years of use, number of kilometers traveled in one year, and number of falls. Through these techniques, we can find that on an average, when the number of kilometers traveled increases, the number of falls also increases. By increasing the number of years of motorcycle usage and so increasing the experience, the number of falls tends to decrease.
A regression analysis can be conducted for a dual purpose:
- Explanatory, to understand and weigh the effects of the independent variable on the dependent variable according...