A Sample of 81 Statistics Students at a Small College $95 \%$

question 7

Multiple Choice

A sample of 81 statistics students at a small college had a mean mathematics ACT score of 24 with a standard deviation of 8 . Find the $95 \%$ confidence interval. Round your answer to two decimal places.

• A) \(23.11 < \mu < 24.89\)
• B) \(77.73 < \mu < 84.27\)
• C) \(23.80 < \mu < 24.20\)
• D) \(22.22 < \mu < 25.78\)

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Definitions:

Lunula

The visible part of the root of the nail, often seen as a white crescent shape at the base of the fingernail or toenail.

Nail Root

The part of a fingernail or toenail that is embedded in the skin and gives rise to the visible nail.

Arrector Pili

Small muscles attached to hair follicles that, when contracted, cause the hair to stand upright (goosebumps).

Skeletal Muscle

A type of muscle that is attached to bones and is responsible for voluntary movements of the body.