Model Building & Variable Selection Q's
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University
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Practice Problem
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Hard
Esther Park
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step to take when you have numerous IVs?
Hypothesize Model
Run Stepwise to determine most important x's
Just choose one IV
2.
FILL IN THE BLANK QUESTION
1 min • 1 pt
This phenomenon is when Independent Variables are strongly related
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does a correlation matrix NOT help us with?
It facilitates our understanding of relationships of variables
It helps us to consider the interrelationships between variables
It tells us the significance of individual parameter estimates
It helps us determine the strength of the relationship between variables
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
T or F: Moderation is an Interaction
True
False
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
T or F: Partial correlations are called second-order correlations
True
False
6.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
What are the two problems of Multicollinearity?
Extreme multicollinearity
There is no way to detect for multicollinearity
Regression results may be confusing/misleading
7.
FILL IN THE BLANK QUESTION
1 min • 1 pt
A severe multicollinearity problem exists if the largest variance inflation factor (VIF) is greater than __
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