Bivariate statistical regression measures

Bivariate statistical regression measures

1. Regression

   • The regression line is the best fit to the point cloud. It passes through the point (x,y) called center of gravity
     • Regression line of Y on X
     • Regression line of X on Y

2. Correlation

   • Linear correlation coefficient
     • ratio of the covariance to the product
   • Correlation attempts to establish the relationship between the two variables of a two-dimensional distribution.
     • Level of correlation
       • strong correlation
         • The correlation will be strong when the points on the line are closer together.
       • Weak correlation
         • The correlation will be weak when the points on the line are farther apart.
       • Null correlation
         • There is no pattern or relationship between them.
     • Type of correlation
       • Direct correlation
       • Inverse correlation
       • Null correlation

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