With simple regression, if we want to know the size of the effect, the best statistic to look at is:
A) the slope
B) the correlation coefficient
C) r-squared
D) the constant

Question

Quizplus · Accepted Answer

The slope in a simple linear regression shows the change in the dependent variable for every one unit change in the independent variable, making it the best statistic to look at for determining the size of the effect. The correlation coefficient (B) shows the strength of the relationship between the variables, but does not indicate the size of the effect. R-squared (C) shows the proportion of variance in the dependent variable explained by the independent variable, but it does not directly indicate the size of the effect. The constant (D) represents the predicted value of the dependent variable when the independent variable is 0, but it does not show the size of the effect on the dependent variable.

With Simple Regression, If We Want to Know the Size