Bivariate statistical measures regression and correlation

Bivariate statistical measures regression and correlation

1. regression

   • The regression line is the one that best fits the point cloud, it passes through the point (x, y) called the center of gravity.
     • regression line of y on x
     • regression line of x on y

2. correlation

   • Correlation tries to establish the relationship that exists between the two variables in a two-dimensional distribution.
     • degree of correlation
       • strong correlation
         • The correlation will be strong when the points are closer to the line.
       • weak correlation
         • The weak correlation when the points of the line are further apart.
       • null correlation
         • There is no kind of pattern or relationship between them.
     • type of correlation
       • direct correlation
       • weak correlation
       • null correlation

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