After a normative study of blood pressure in people older than age 50, the researchers realized that they did not record the people's ages.The lack of knowledge about their ages is considered a potential
A)confounding variable
B)dependent variable
C)independent variable
D)response variable
E)diagnostic variable

Question

Quizplus · Accepted Answer

The lack of knowledge about the participants' ages could influence the relationship between other variables in the study, such as the effect of various factors on blood pressure, making age a potential confounding variable.

After a Normative Study of Blood Pressure in People Older