The Sample Size Needed to Estimate a Population Mean Within

question 141

Multiple Choice

The sample size needed to estimate a population mean within 1.5 units with a 95% confidence when the population standard deviation equals 10 is:

• A) 121
• B) 13
• C) 171
• D) 54
• E) 88

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Definitions:

Mature Adults

Individuals who have reached an advanced stage of psychological development, characterized by a high level of emotional stability and responsibility.

Cardinal Traits

Core personality traits that are dominant and define a person's overall behavior and attitude.

Common Traits

Characteristics shared by most members of a population, often used in personality psychology to describe aspects of human behavior.

Ego Perception

An individual's awareness and understanding of their ego, which in psychoanalytic theory, refers to the conscious, rational part of the psyche.