ISYE-6414-OAN Quizzes Midterm Exam 2 - CloseScore for this quiz: 34.5 out of 50
Submitted Apr 4 at 1:16pm
This attempt took 23 minutes.
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Question 1 1.5 / 1.5 pts
In a multiple linear regression model, an observation should always
be discarded from the model when its Cook’s distance is greater
than , where is the sample size. 4
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True
False Correct!
3.11. Assumptions and Diagnostics Data Examples
An observation should not be discarded just because it is
found to be an outlier. We must investigate the nature of the
outlier before deciding to discard it.
Question 2 0 / 1.5 pts
Adjusted R always increases as more predictors are added to a
multiple linear regression model, given that the predictors added are
unrelated to the response variable.
2
True You Answered
False Correct Answer
3.13. Model Evaluation and Multicollinearity
Adjusted R2 already adjusts for the number of predictors in
the model. Therefore, Adjusted R2 does not increase as more
predictors are added to a multiple linear regression model. See
Lesson 3.3.3d Book Section - Part 1 with Correct Answers Graded A+ [Show Less]