We Have Calculated a 95% Confidence Interval and Would Like

question 66

Multiple Choice

We have calculated a 95% confidence interval and would like our next confidence interval to have a smaller margin of error without losing any confidence. In order to do this, we can

• A) change the z* value to a smaller number.
• B) take a larger sample.
• C) take a smaller sample.
• D) use z* = 2.576.
• E) use z* = 1.645 and decrease size of sample.

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Definitions:

Broca's Aphasia

A condition resulting from damage to the Broca's area of the brain, characterized by impaired speech production while understanding of language remains relatively intact.

Speech

The verbal expression of thoughts and feelings through articulated sounds.

Phrenology

Phrenology is an outdated and discredited theory that suggested the bumps on the skull could predict mental traits and character.

Assumptions

Accepted facts or statements taken as true without proof, often serving as the foundation for further reasoning or argument.