After Computing a Confidence Interval, the User Believes the Results

question 103

Multiple Choice

After computing a confidence interval, the user believes the results are meaningless because the width of the interval is too large. Which one of the following is the best recommendation?

• A)Increase the level of confidence for the interval.
• B)Decrease the sample size.
• C)Increase the sample size.
• D)Reduce the population variance.

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Definitions:

Cholesterol Levels

The measure of cholesterol in the blood, which can indicate risk for heart disease; includes measurements of LDL (bad) and HDL (good) cholesterol.

Stroke

A medical condition occurring when the blood supply to part of the brain is interrupted or reduced, causing brain cells to die due to a lack of oxygen.

Heart Disease

A range of conditions affecting the heart, including coronary artery disease, heart rhythm problems, and heart defects.

Emphysema

A chronic lung disease characterized by overdistension of the alveolar sacs and inability to exchange oxygen and carbon dioxide.