What Sample Size Is Needed to Estimate with 95 Percent

question 89

Multiple Choice

What sample size is needed to estimate with 95 percent confidence the mean intake of daily calcium within 20 units of the true mean if the intake is normally distributed with a variance of 1900 units?

• A) 34,671
• B) 187
• C) 32
• D) 19

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Definitions:

Personality Disorders

Types of mental disorders characterized by enduring maladaptive patterns of behavior, cognition, and inner experience, exhibited across many contexts and deviating from those accepted by the individual's culture.

Anxiety

An emotion characterized by apprehension, tension, or discomfort, often regarding an upcoming event or a situation with an unpredictable result.

Eccentricity

A quality of being unconventional or slightly strange in behavior or appearance.

Impulsivity

The tendency to act on a whim, displaying behavior characterized by little or no forethought, reflection, or consideration of the consequences.