
ERSH 8320_DOS
Authored by Deborah Shomuyiwa
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University

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10 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is the main purpose of hierarchical regression?
To find the best-fitting model without theory
To screen variables based on VIF
To test competing models based on theory
To center variables automatically
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is the first step in building a multiple regression model with “few” independent variables?
Run stepwise regression
Hypothesize the model using theory
Remove multicollinearity
Check for quadratic terms
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What does R² represent in regression?
The predicted values
The variance in Y explained by X
The intercept
The residual
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What’s the key difference between partial and semi-partial correlation?
Partial removes shared variance from both X and Y
Semi-partial removes from both X and Y
Partial is always smaller
They measure the same thing
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What does a squared semi-partial correlation tell us?
Error variance in Y
Redundancy among predictors
Strength of multicollinearity
Unique variance in Y explained by a predictor
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What makes a model “second-order”?
It only includes main effects
It includes an interaction term
It includes squared terms and interactions
It includes control variables
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is a suppressor variable?
A variable that increases Type I error
A variable that doesn’t correlate with Y but controls irrelevant variance
A quadratic term
A mediator
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