A Major Retail Clothing Store Is Interested in Estimating the Difference

question 37

Multiple Choice

A major retail clothing store is interested in estimating the difference in mean monthly purchases by customers who use the store's in-house credit card versus using a Visa,Mastercard,or one of the other major credit cards.To do this,it has randomly selected a sample of customers who have made one or more purchases with each of the types of credit cards.The following represents the results of the sampling: Given this information,which of the following statements is true?

• A)If either of the sample sizes is increased,the resulting confidence interval will have a smaller margin of error.
• B)If the confidence level were changed from 95 percent to 90 percent,the margin of error in the estimate would be reduced.
• C)Neither A nor B are true.
• D)Both A and B are true.

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Definitions:

Hip Fracture

A break in the upper quarter of the femur (thigh bone), commonly associated with osteoporosis and falls in the elderly.

Nursing Intervention

Rephrased: Acts performed by nursing staff to address specific patient needs or conditions.

Case Management

Organized system for delivering health care to an individual patient or group of patients across an episode of illness and/or a continuum of care; includes assessment and development of a plan of care, coordination of all services, referral, and follow-up; usually assigned to one professional.

Cost-effectiveness

A measure used to evaluate the efficiency of a product or service by comparing its cost to the benefits it delivers, often used in healthcare to determine the best use of limited resources.