In a First-Order Model with Two Predictors X₁ and X₂,an

question 9

Multiple Choice

In a first-order model with two predictors x₁ and x₂,an interaction term may be used when the:

• A)relationship between the dependent variable and the independent variables is linear.
• B)effect of x₁ on the dependent variable is influenced by x₂.
• C)Effect of x₂ on the dependent variable is influenced by x₁.
• D) both b and c.

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Definitions:

Significance Level

The probability of rejecting the null hypothesis in a statistical test when it is actually true, serving as a critical value for decision-making in hypothesis testing.

Coefficient

A numerical or constant quantity placed before and multiplying the variable in an algebraic expression (e.g., in math or statistics).

Dummy Variables

Numerical variables used in statistical modeling to represent subgroups of the sample in regression analyses.

Nominal Variable

A type of variable that represents categories with no inherent numeric value or order.