Bivariate statistical measures

Bivariate statistical measures

1. Correlation analysis

   • Measures the closeness of the relationship between two or more variables
   • Correlation
     • Statistical technique used to measure closeness

2. Bivariate statistical measures

   • R2 determination coefficient
   • simple linear correlation
   • Positive and negative correlation
   • Dispersion diagram
   • Regression
   • Simple Regression

3. regression problems

   • inhomogeneous variance
   • nonlinear relationship
   • Correlated errors

4. Regression Analysis

   • It is used to derive an equation that relates the variable
   • Study relationship between two quantitative variables
   • Study the strength of the association

5. Problemas de Regresión

   • inhomogeneous variance
   • nonlinear relationship
   • Correlations errors

6. Simple linear regression model

   • Simple linear regression model
   • independent residues
   • Residuals with constant variance

7. Regression analysis model

   • Statistical
     • Allows the addition of a random component
   • standardized
     • The slope tells us that there is a relationship between two variables.
   • deterministic
     • It can be a mathematical function

8. Covariance of two random variables X and Y

   • It tells us if the relationship between the two variables is direct or inverse.
   • The sign of the covariance tells us that the cloud of points is increasing or not.

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