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A study involves three variables: income level, hours spent watching TV per week, and hours spent...

Question:

A study involves three variables: income level, hours spent watching TV per week, and hours spent at home on the Internet per week. List some ways the variables might be confounded. (Select all that apply.)

A. People who spend time at home on the Internet never watch TV.

B. People with higher incomes likely will have high-speed Internet access, which will lead to spending more time online.

C. People with higher incomes might not own TVs or computers.

D. Spending more time online might lead to spending less time watching TV.

E. People with lower incomes might not own TVs or computers.

confounding variable

Confounding variable is such a variable which a researcher has not considered for her research. These variables may mess up the analysis by producing false association between the dependent and independent variable.

Answer and Explanation:

Confounding variable is an unnecessary variable which might lead to biased and incorrect results. A study involves three variables: income level, hours spent watching TV per week, and hours spent at home on the Internet per week. Now, people with low income might not have a TV at home. Similarly, people with higher incomes likely will have high-speed Internet access, which will lead to spending more time online. Also, people who spend time at home on the Internet never watch TV. Hence, the three ways the variables might be confounded are B, E and A respectively.


Learn more about this topic:

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Confounding Variables in Statistics: Definition & Examples

from Statistics 101: Principles of Statistics

Chapter 1 / Lesson 16
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