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Bivariate statistical measures regression and correlation

Bivariate statistical techniques allow the joint analysis of two characteristics of the individuals in a population with the purpose of detecting possible relationships between them. The nature (nominal, ordinal or numerical).

regression

We use it to mean the estimation of a variable based on another known value, corresponding to the other variable.

examines the relationship between two variables by restricting one of them with respect to the other, in order to study the variations of the first when the other remains constant.

The correlation between two variables seeks to determine the degree of relationship that exists between the two of them. It is calculated with the correlation coefficients.

Linear regression

Correlation

It is said that there is a positive linear correlation between two variables, if increasing or decreasing the values ​​of the independent variable increase or decrease those of the dependent variable.

when increasing the values ​​of the independent variable decreases the values ​​of the dependent variable. either Vice versa, the linear correlation is said to be negative

Positive correlation

Negative correlation

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