Model Building & Variable Selection Q's

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

This phenomenon is when Independent Variables are strongly related

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

T or F: Moderation is an Interaction

• True

• False

T or F: Partial correlations are called second-order correlations

• True

• False

What are the two problems of Multicollinearity?

• Extreme multicollinearity

• There is no way to detect for multicollinearity

• Regression results may be confusing/misleading

A severe multicollinearity problem exists if the largest variance inflation factor (VIF) is greater than __

Tolerance should NOT be under .__

How many bends in a quadratic equation?

• zero

• one

• two

What does Dr. Ferster call her us/students?

• Regression Experts

• Regressioners

• My precious

• Regression Queens/Kings