A Major Department Store Chain Is Interested in Estimating the Average

question 13

Multiple Choice

A major department 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: $\overline{X} = \$50.50$ and s² = 400. Construct a 95% confidence interval for the average amount its credit card customers spent on their first visit to the chain's new store in the mall assuming that the amount spent follows a normal distribution.

• A) $50.50 ± $11.00
• B) $50.50 ± $9.09
• C) $50.50 ± $10.12
• D) $50.50 ± $11.08

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Definitions:

Habituation

The process by which an organism decreases or ceases its responses to a repetitive stimulus over time.

Sensation

The physical response of sensory receptors when a stimulus is detected (e.g., activity of the sensory receptors in the eye in response to light); awareness of stimuli in the senses.

Perception

The mental processing of sensory information, which is interpreted as sight, sound, and smell, for example.

Locomotion

The capability to transition between locations, encompassing activities such as walking, running, swimming, or flying.