The Office of Student Services at a Large Western State

question 38

Multiple Choice

The Office of Student Services at a large western state university maintains information on the study habits of its full-time students. Their studies indicate that the mean amount of time undergraduate students study per week is 20 hours. The hours studied follows the normal distribution with a standard deviation of six hours. Suppose we select a random sample of 144 current students. What is the probability that the mean of this sample is between 19 hours and 20 hours?

• A) 2.00
• B) 0.4772
• C) -2.00
• D) Cannot be calculated based on the given information.

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Definitions:

Obsessive-Compulsive Disorder

A mental health disorder characterized by persistent, unwanted thoughts (obsessions) and repetitive behaviors (compulsions) that the individual feels driven to perform.

Distressing Stimulus

An external trigger or event that causes stress, discomfort, or emotional pain to an individual.

Behavior Therapy

A type of psychotherapy that focuses on changing unwanted behaviors through various techniques, such as conditioning.

Classical Conditioning

A conditioning strategy where two stimuli are methodically paired together; the response, at outset caused by the second stimulus, is eventually caused by the first stimulus without aid.