Bivariate statistical measures regression and correlation.

Bivariate statistical measures regression and correlation.

1. Regression

   • Regression analysis refers to the fact that there is a link between various events. One of the tools that allows us to infer whether such a link exists is precisely the correlation analysis.
     • Goal
       • It is trying to explain the relationship that exists between a dependent variable and a set of independent variables, building a function that allows estimating and calculating the value of the study variable.
     • Floating rate
       • Independent or regressive variable
         • They are used as predictors of confounding variables.
       • Dependent or response variable
         • It is used to observe, make changes or predictions in the factors.

2. Correlation

   • Correlation refers to a link between various events. One of the tools that allows us to infer that if there is a link is precisely the analysis of a correlation.
     • Goal
       • Correlation analysis is a statistical procedure to determine if two variables are related or not. Indicating if there is a relationship between two events either by said relationship or force
     • Floating rate
       • direct correlation: Direct correlation occurs when increasing one of the variables increases the other. The line corresponding to the cloud of points of the distribution is an increasing line.
       • inverse correlation: Inverse correlation occurs when one variable increases and the other decreases. The line corresponding to the point cloud of the distribution is a decreasing line.
       • null correlation: The null correlation occurs when there is no dependency of any kind between the variables. In this case, the variables are said to be uncorrelated and the point cloud has a rounded shape
     • Degree of correlation
       • Weak correlation: This correlation is weak when the points on the line are separated.
       • Strong correlation: This correlation is stronger the more nearby are the points on the line.
       • Null correlation: In this correlation there is no type of pattern or relationship between them.
     • Correlation coefficient

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