Use the Given Degree of Confidence and Sample Data to Construct

question 38

Multiple Choice

Use the given degree of confidence and sample data to construct a confidence interval for the population mean $\mu$ . Assume that the population has a normal distribution. $n = 30 , \bar { x } = 84.6 , s = 10.5,90 \%$ confidence

• A) \(79.32 < \mu < 89.88\)
• B) \(81.36 < \mu < 87.84\)
• C) \(81.34 < \mu < 87.86\)
• D) \(80.68 < \mu < 88.52\)

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Definitions:

Anecdotal Information

Informal accounts or personal observations used as evidence but not scientifically proven.

Assessment Instruments

Tools and methods used to evaluate or measure specific traits, abilities, or knowledge in individuals.

Observation

The active acquisition of information from a primary source using the senses or instruments that extend the senses.

Rank Order

A method of arranging data or items in a sequence based on their value or magnitude, from highest to lowest or vice versa.