A Student Wanted to Quickly Construct a 95% Confidence Interval

question 12

Multiple Choice

A student wanted to quickly construct a 95% confidence interval for the average age of students in
Her statistics class. She randomly selected 9 students. Their average age was 19.1 years with a
Standard deviation of 1.5 years. What is the 95% confidence interval for the population mean?

• A) [0.97, 3.27]
• B) [15.64, 22.56]
• C) [17.97, 20.23]
• D) [17.95, 20.25]
• E) [17.42, 20.78]

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Definitions:

"More or less"

A phrase indicating that the exact figure or detail is flexible and may vary slightly.

Dimensions

Refers to measurements or aspects of objects, spaces, or abstract concepts, often expressed in terms of length, width, height, depth, or scope.

Discrepancy

A lack of compatibility or uniformity that leads to a difference between things that should be the same, often leading to conflict or confusion.

Avoid

To keep oneself from doing something, or to prevent a particular outcome from happening.