Solve the Problem. -A Researcher Wishes to Construct a 95% Confidence Interval for Confidence

question 90

Multiple Choice

Solve the problem.
-A researcher wishes to construct a 95% confidence interval for a population mean. She selects a simple random sample of size n = 20 from the population. The population is normally distributed and is known. When constructing the confidence interval, the researcher should use the normal distribution; however, she incorrectly uses the t distribution. How does this incorrectly calculated confidence relate to the correct confidence interval?

• A)The calculated confidence interval is shifted to the right of the correct confidence interval.
• B)The calculated confidence interval is narrower than the correct confidence interval.
• C)The calculated confidence interval is wider than the correct confidence interval.
• D)The calculated confidence interval is shifted to the left of the correct confidence interval.

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