A 95% Confidence Interval for a Population Mean Is Determined

question 46

Multiple Choice

A 95% confidence interval for a population mean is determined to be 100 to 120. For the same data, if the confidence coefficient is reduced to .90, the confidence interval for μ

• A) becomes narrower.
• B) becomes wider.
• C) does not change.
• D) becomes 100.1 to 120.1.