A 95% Confidence Interval Estimate for a Population Mean

question 60

Multiple Choice

A 95% confidence interval estimate for a population mean  is determined to be 43.78 to 52.19. If the confidence level is decreased to 90%, the confidence interval:

• A)becomes wider.
• B)remains the same.
• C)becomes narrower.
• D)None of these choices are correct.

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