Questions
MCD2080 - T1 - 2025 Lecture Lesson 1 (week 8)
Multiple choice
Which two of the of the following statements are correct regarding R2 as a tool to evaluate a regression model. Multiple answers allowed.
Options
A.a. If the R2 value is greater than 1, then it shows that the regression model is a very good fit.
B.b. The R2 value needs to be reported in presenting regression results as it shows the relative precision of the model for the users to consider.
C.c. The R2 is the proportion of the total variation in X that can be explained by the variation in the dependent variable in the model.
D.d. R2 reflects the model’s improvement of the predicted value over the estimator of the sample mean (Y-bar).
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Step-by-Step Analysis
Option a: This statement is misleading because R-squared (R2) cannot exceed 1 in standard regression contexts. It represents the proportion of variance in the dependent variable that is explained by the model, and values greater than 1 indic......Login to view full explanationLog in for full answers
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