STATISTICS - 1.2
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What is meant by confounding? - Answer: Confounding in a study occurs when the
effects of two or more explanatory variables are not separated. Therefore, any relation
that may exist between an explanatory variable and the response variable may be due
to some other variable or variables not accounted for in the study.
Confounding is potentially a major problem with observational studies. Often, the cause
of confounding is a lurking variable.
What is a lurking variable? - Answer: A lurking variable is an explanatory variable that
was not considered in a study, but that affects the value of the response variable in the
study. In addition, lurking variables are typically related to explanatory variables in the
study.
A relation that appears to exist between a certain explanatory variable and the response
variable may be due to some other variable or variables not accounted for in the study.
These variables are called lurking variables.
What is a confounding variable? - Answer: A confounding variable is an explanatory
variable that was considered in a study whose effect cannot be distinguished from a
second explanatory variable in the study.
The big difference between lurking variables and confounding variables is that lurking
variables are not considered in the study whereas confounding variables are measured
in the study.
Forty patients with skin cancer are divided into two groups. One group receives an
Experimental drug to fight cancer comma the other a placebo. After two years comma
the spread of the cancer is measured.
1
APPHIA - Crafted with Care and Precision for Academic Excellence.
Quality content you can rely on!
What is meant by confounding? - Answer: Confounding in a study occurs when the
effects of two or more explanatory variables are not separated. Therefore, any relation
that may exist between an explanatory variable and the response variable may be due
to some other variable or variables not accounted for in the study.
Confounding is potentially a major problem with observational studies. Often, the cause
of confounding is a lurking variable.
What is a lurking variable? - Answer: A lurking variable is an explanatory variable that
was not considered in a study, but that affects the value of the response variable in the
study. In addition, lurking variables are typically related to explanatory variables in the
study.
A relation that appears to exist between a certain explanatory variable and the response
variable may be due to some other variable or variables not accounted for in the study.
These variables are called lurking variables.
What is a confounding variable? - Answer: A confounding variable is an explanatory
variable that was considered in a study whose effect cannot be distinguished from a
second explanatory variable in the study.
The big difference between lurking variables and confounding variables is that lurking
variables are not considered in the study whereas confounding variables are measured
in the study.
Forty patients with skin cancer are divided into two groups. One group receives an
Experimental drug to fight cancer comma the other a placebo. After two years comma
the spread of the cancer is measured.
1
APPHIA - Crafted with Care and Precision for Academic Excellence.
