An Example in the Text Hypothesized That 4% of the Variability

question 12

Multiple Choice

An example in the text hypothesized that 4% of the variability in life expectancy was accounted for by variability in smoking behavior. The values of r and r² , respectively, are equal to

• A) .20 and .04.
• B) .04 and .16.
• C) .04 and .20.
• D) More information is needed.

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Definitions:

Magnetoencephalography (MEG)

A technique for using delicate magnetic sensors on the outside of the skull to detect brain activity.

Positron Emission Tomography (PET)

A technique for creating images of brain activity by injecting a radioactive tracer into the blood and then, using a scanner, finding where in the brain the blood is being metabolized.

Substantia Nigra

A part of the brain involved in the control of movement and is associated with diseases such as Parkinson's due to its role in dopamine production.

Dopamine

A neurotransmitter in the brain that plays an important role in positive emotions and response to reward.