The Statistic (N − 1)s² / σ² Has a Chi-Squared

question 81

Multiple Choice

The statistic (n − 1) s² / σ² has a chi-squared distribution with n − 1 degrees of freedom if:

• A)the sample has a Student t-distribution with degrees of freedom equal to n − 1.
• B)the sample is normally distributed with variance equal to s².
• C)the population is normally distributed with variance equal to σ².
• D)All of these choices are true.

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Definitions:

Phobic Responses

Exaggerated fears triggered by specific objects, situations, or activities, resulting in intense anxiety or avoidance behaviors.

Mowrer

Psychologist O.H. Mowrer, known for his theories on learning and contributions to behavior therapy, especially in the treatment of fears and enuresis.

Obsessive-Compulsive Disorder

A mental disorder characterized by persistent, unwanted thoughts (obsessions) and repetitive behaviors (compulsions).

Claustrophobia

An anxiety disorder characterized by an intense fear of being enclosed in a small space or unable to escape, leading to panic.