In Constructing a Confidence Interval for the Population Mean When $$\bar { X } \pm t _ { a n , n - 1 } ( s / \sqrt { n } )$$

question 58

Multiple Choice

In constructing a confidence interval for the population mean when the population variance is unknown, which of the following assumptions is required when using the following formula? $$\bar { X } \pm t _ { a n , n - 1 } ( s / \sqrt { n } )$$

• A)The sample size is greater than 30.
• B)The population variance is known.
• C)The population is normal.
• D)The sample is drawn from a positively skewed distribution.

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Definitions:

Response Prevention

A behavioral treatment technique, particularly used in treating OCD, where the patient is prevented from performing a compulsive behavior.

Systematic Desensitization

A behavioral therapy technique used to reduce phobic responses or anxiety through gradual exposure to the feared object or situation coupled with relaxation exercises.

Anxiety

A sensation of apprehension or fear, often about something that is going to happen soon or an outcome that is not yet clear.

Learned Response

Behaviors developed through experience or conditioning, as opposed to innate or instinctual reactions.