Billy, the 4^th Grader Receiving Failing Grades in School, as Described

question 35

Multiple Choice

Billy, the 4^th grader receiving failing grades in school, as described in the text, appeared to be a case of ___.

• A) attention deficit
• B) depression
• C) malingering
• D) intellectual disability

---

Definitions:

Nominal Variables

Variables that represent categories with no inherent order or ranking among them.

First-Order Model

A mathematical model that describes a system using a first-degree differential equation, which relates system output to inputs and internal states with only the first derivative of time.

Predictor Variables

Variables in statistical models that are used to predict the outcome of a response variable.

Predictor Variables

Variables used in statistical models to predict or affect the outcomes of a dependent variable.