A Major Electronics Store Chain Is Interested in Estimating the Average

question 1

Multiple Choice

A major electronics store chain is interested in estimating the average amount its credit card customers spent on their first visit to the chain's new store in the mall.Fifteen credit card accounts were randomly sampled and analyzed with the following results: = $50.50 and s² = 400.A 95% confidence interval for the average amount the credit card customers spent on their first visit to the chain's new store in the mall is:

• A)$50.50 ± $9.09.
• B)$50.50 ± $10.12.
• C)$50.50 ± $11.08.
• D)None of these choices.

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Definitions:

Filum Terminale

The filum terminale is a thin filament of connective tissue that extends from the apex of the conus medullaris (the tapered lower end of the spinal cord) to the coccyx, anchoring the spinal cord in place.

Spinal Cord

A long, thin, tubular structure made up of nervous tissue, which extends from the brainstem down the back, and transmits nerve signals between the brain and the rest of the body.

Anterior Ramus

is a branch of a spinal nerve that passes anteriorly (towards the front) to supply muscles and skin on the front of the body.

Communicating Rami

Nerves that connect the spinal nerves to the sympathetic trunk, facilitating communication between the central and autonomic nervous systems.