Use the Confidence Level and Sample Data to Find a Confidence

question 21

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 59 randomly selected students have a mean score of $29.5$ with a standard deviation of $5.2$ on a placement test. What is the $90 \%$ confidence interval for the mean score, $\mu$ , of all students taking the test?

• A) \(27.8 < \mu < 31.2\)
• B) \(27.9 < \mu < 31.1\)
• C) \(28.2 < \mu < 30.8\)
• D) \(28.4 < \mu < 30.6\)

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Definitions:

Summative Evaluation

An assessment conducted at the end of a project or a specific time period to determine its effectiveness or outcomes.

Feedback

Information provided regarding one's performance or behavior, intended to reinforce strengths or identify areas for improvement.

Measurable

Capable of being quantified or expressed as a numerical value.

Treatment Goals

Treatment goals are specific, measurable objectives set by a therapist and client to address the issues that brought the client into therapy.