#regression_analysis  the use of regression to make quantitative predictions of one variable from the values of another
  supertype:  #statistical_method__statisticalmethod  a method of analyzing or representing statistical data
  part:  #regression_toward_the_mean__regression__simple_regression  the relation between selected values of x and observed values of y (from which the most probable value of y can be predicted for any value of x)
  part:  #regression_equation__regression_of_y_on_x  the equation representing the relation between selected values of one variable (x) and observed values of the other (y); it permits the prediction of the most probable values of y
  part:  #regression_line__regression_curve  a smooth curve fitted to the set of paired data in regression analysis; for linear regression the curve is a straight line

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