A Researcher Investigates Whether There Is a Relationship Between Hours

question 2

Multiple Choice

A researcher investigates whether there is a relationship between hours spent watching television and children's vocabulary by asking 40 randomly selected 11-year-olds how many hours of television they watch per week and then having them take a vocabulary test.What is the independent variable in this study?

• A)hours of television watching
• B)vocabulary scores
• C)age of the subjects
• D)there is no independent variable;the study is correlational

---

Definitions:

I/O Modules

Hardware components in a control system that provide interfaces for input and output signals, facilitating communication between the processing unit and external devices.

PID Control

A type of feedback control system that uses Proportional, Integral, and Derivative terms to control an output variable, widely used in industrial control systems.

Mathematical Functions

Predefined operators or procedures in programming that perform calculations or mathematical operations on data.