Bivariate statistical measures
REGRESSION AND CORRELATION
These two variables are related, such as weight and height, income and expenses, production and
consumption, etc. It is important to establish the relationship between them, this procedure is called
regression and correlation analysis, and to be able to evaluate one of them based on the other.
The relationship that exists between the two variants is classified as
Unilateral causal dependence
Interdependence
Indirect dependence:
Concordance
Causal covariation:
when the correlation that occurs between
the two variables is completely causal or
accidental.
it is presented in two independent variables
which are called the correlation that may
exist.
when two variants can show a correlation
through a third variable that influences
each other.
when the influence between the two
variants is reciprocal, bilateral
dependence.
when one of the variables influences the
other, but not vice versa
Regression
Statistical method developed to investigate such
relationships, term was used by Galton to indicate the
relationships of biological inheritance
Regression analysis
Mathematical equation that allows us to describe the relationship
between two variants, obtain a line known as the regression line
that describes the relationship or dependency between two
variants
Correlation
Statistical measure that expresses to what extent two
variables are linearly related.
Correlation analysis
Describes the degree of strength with which this relationship
occurs, a measure known as the correlation coefficient or Pearson
correlation is used. It allows to measure the strength of
association between two variables, and to know the value or
known average for the other variable called independent.
The line or mathematical function in the case of an independent or
explanatory variable, with these functions most of the situations that
arise in daily life can be solved and can be expressed through