Coleman Surveys a Random Sample of City Residents and Uses

question 9

Multiple Choice

Coleman surveys a random sample of city residents and uses a 95% confidence interval to estimate the proportion of all city residents who plan to vote in an upcoming election. Emma isn't satisfied with 95% confidence. She wants to use a 99% confidence interval, but she doesn't want it to be any wider that Coleman's 95% confidence interval. In order to achieve this, Emma must

• A) take a sufficiently larger random sample of city residents.
• B) take a sufficiently smaller random sample of city residents.
• C) reject the null hypothesis.
• D) have a sufficiently small P-value.
• E) Both reject the null hypothesis, and have a sufficiently small P-value.

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Definitions:

Cardiomyopathy

A disease of the heart muscle that makes it harder for the heart to pump blood to the rest of the body, potentially leading to heart failure.

Heart Muscle

The muscle tissue of the heart, known as cardiac muscle, which is responsible for pumping blood throughout the body.

Anastomosis

A surgical connection made between two tubular structures, such as blood vessels or segments of the intestine.

Blood Vessel

Tubular structures carrying blood through the tissues and organs; a vein, artery, or capillary.