Dr Abromowitz Has Done a Study Looking at the Correlation

question 233

Multiple Choice

Dr. Abromowitz has done a study looking at the correlation between depression in children and amount of television they watched. He finds what seems to be a strong, positive correlation between the two. He decides that watching too much T.V. causes children to become depressed. However, he has a third variable problem. Which of the following is an example of a third variable problem?

• A) Parental depression is strongly correlated with both children's depression and the amount of T.V. a child watches.
• B) Being depressed causes a child to watch too much T.V.
• C) Making any conclusions about connections between only two variables.
• D) Thinking there is a connection between variables when there is none.

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Definitions:

Speculum

A medical instrument used to dilate an orifice or cavity for examination purposes, such as during a gynecological exam.

Otoscope

A medical device used to look into the ears, allowing for the examination of the ear canal and tympanic membrane.

Gingival Margin

The edge of the gum tissue that surrounds the teeth, marking the boundary between the crown of the tooth and the beginning of the gum.

Ciliated Mucous Membrane

A type of mucous membrane that contains hair-like structures called cilia, which help to move mucus and trapped particles.