A Student Wanted to Construct a 95% Confidence Interval for the Average

question 75

Multiple Choice

A student wanted to 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 99% confidence interval for the population mean?

• A) [17.42, 20.78]
• B) [17.48, 20.72]
• C) [14.23, 23.98]
• D) [0.44, 3.80]

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Definitions:

Hormones

Chemical messengers produced by glands in the body, which travel through the bloodstream to regulate various physiological processes and behaviors.

Bloodstream

The flowing blood within the circulatory system of the body, carrying oxygen and nutrients to cells and removing waste products.

Glial Cells

Non-neuronal cells in the brain and central nervous system that support, protect, and provide a support framework for neurons.

Myelin

A fatty substance that surrounds nerve fibers, providing insulation and speeding the transmission of nerve impulses.