If the Width of a Confidence Interval For $\mu$ Is Too Wide When the Population Standard Deviation

question 42

Multiple Choice

If the width of a confidence interval for $\mu$ is too wide when the population standard deviation $\sigma$ is known, which one of the following is the best action to reduce the interval width?

• A) Increase the confidence level
• B) Reduce the population standard deviation \(\sigma\)
• C) Increase the population mean \(\mu\)
• D) Increase the sample size n
• E) None of the above answers are correct.

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Definitions:

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