Use the Confidence Level and Sample Data to Find a Confidence

question 66

Multiple Choice

Use the confidence level and sample data to find a confidence interval for estimating the population µ. Round your answer to the same number of decimal places as the sample mean.
-A group of 64 randomly selected students have a mean score of $38.6$ with a standard deviation of $4.9$ on a placement test. What is the $90 \%$ confidence interval for the mean score, $\mu$ , of all students taking the test?

• A) \(37.4 < \mu < 39.8\)
• B) \(37.2 < \mu < 40.0\)
• C) \(37.6 < \mu < 39.6\)
• D) \(37.0 < \mu < 40.2\)