The Covariance of Two Variables X and Y

question 17

Multiple Choice

The covariance of two variables X and Y:

• A)must be between −1 and +1.
• B)must be positive.
• C)can be any real number.
• D)None of these choices.

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Definitions:

Manic Episode

A period of unusually elevated or irritable mood, energy levels, and activity, often associated with bipolar disorder.

Mental Control

The ability to regulate one's thoughts, feelings, and actions through cognitive processes.

Psychotic Break

A severe mental disturbance characterized by a disconnection from reality, which can include hallucinations, delusions, or disordered thinking.

Major Depressive Disorder

A mental health disorder characterized by persistent feelings of sadness, lack of interest in activities, and a range of emotional and physical symptoms.