A Statistician Wishes to Reduce the Margin of Error Associated

question 171

Multiple Choice

A statistician wishes to reduce the margin of error associated with a confidence interval estimate for a population proportion p. She needs to:

• A) reduce the confidence level 1 -
• B) decrease the sample size n
• C) take another sample
• D) increase the sample size n
• E) do none of these

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Definitions:

Psychiatric Disorder

A mental illness diagnosed by a medical or mental health professional that significantly interferes with an individual's cognitive, emotional, or social abilities.

American Psychiatric Association

A professional organization of psychiatrists aimed at advancing the study, prevention, and treatment of mental illnesses.

Phrenologists

Pseudoscientific practitioners who believed that the shape and size of the cranium could predict personality traits, character, and mental abilities.

Medieval Doctors

Healthcare practitioners in the Middle Ages who often relied on a mixture of religious beliefs, superstition, and early medical practices to treat patients.