If Variables with a Multivariate Normal Distribution Have Covariances That

question 33

Multiple Choice

If variables with a multivariate normal distribution have covariances that equal zero,then

• A)the correlation will most often be zero,but does not have to be.
• B)the variables are independent.
• C)you should use the χ2 distribution to calculate probabilities.
• D)the marginal distribution of each of the variables is no longer normal.

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Definitions:

Divisible

Capable of being divided or separated into smaller components or parts.

Pygmalion Effect

The phenomenon where higher expectations lead to an increase in performance; a form of self-fulfilling prophecy.

Perceptual Distortion

A cognitive bias or error that affects the accuracy of one's perception or interpretation of reality.

Vicarious Learning

The process of learning by observing the actions and outcomes of others rather than through direct experience.