If a Group of Independent Variables Are Not Significant Individually

question 62

Multiple Choice

If a group of independent variables are not significant individually but are significant as a group
At a specified level of significance, this is most likely due to

• A) autocorrelation.
• B) the presence of dummy variables.
• C) the absence of dummy variables.
• D) collinearity.

---

Definitions:

Tandem Drive Axle

One of a pair of drive axles used in tandem drive highway trucks.

Air Brake Equipped Tractor

A tractor fitted with a pneumatic brake system, utilizing compressed air to create braking force for the vehicle.

Service Application Circuit

A specific circuit designed for a particular function or application within a larger system, often related to maintenance or service procedures.

Hold-Off Circuit

A hydraulic circuit designed to delay or prevent the application of certain functions, often used in braking systems.