A Major Department Store Chain Is Interested in Estimating the Mean

question 40

Multiple Choice

A major department store chain is interested in estimating the mean 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: X = $50.50 and S = 20. Construct a 95% confidence interval for the mean 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 ± $9.09
• B) $50.50 ± $10.12
• C) $50.50 ± $11.00
• D) $50.50 ± $11.08

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Definitions:

Quantity Variances

The difference between the expected and actual amount of materials or resources used in a production process, often in reference to budgeting and cost control.

Direct Labor Rate Variance

The difference between the actual cost of direct labor and the expected (or standard) cost, often analyzed to manage and control production costs.

Time Variance

The difference between the planned amount of time to complete a project or task and the actual time taken.

Total Cost Variance

The difference between the actual cost and the standard or expected cost of goods or services produced over a given period.