2e Slide # 36 Q5: Regression Output Terminology: Adjusted R-Square If each Y value had an associated X value
then we could reorder the Y observations along the X axis according to the value of the associated X. Now we can measure how the Y observations vary from the âline of best fitâ instead of from the average of the Y observations. Adjusted R-Square measures the portion of Yâs variation about its mean that is explained by Yâs relationship to X.