bivariate statistical measures

bivariate statistical measures

1. of correlation

   • Correlation examines the strength of the relationship between two variables, neither of which is necessarily considered the target variable.
   • study of relationship between two variables, independent (x), dependent (y)
   • Its purpose is to examine the direction and strength of association between quantitative variables, to know the intensity of the relationship between them and if this increases the value of one variable, it increases or decreases that of the other.

2. of regression

   • Regression examines the strength of the relationship between one or more predictor variables and a target variable.
   • mathematical model used to analyze the correlation
     • This mathematical function can be expressed through
       • parabola of the second degree
       • potential function
       • exponential function
       • line or linear function

3. tool for joint analysis of characteristics of subjects in a population to establish the type of relationship between them