A Large Department Store Examined a Sample of 18 Credit

question 62

Multiple Choice

A large department store examined a sample of 18 credit card sales and recorded the amounts charged for each of three types of credit cards: MasterCard,Visa,and Discover. Six MasterCard sales,seven Visa,and five Discover sales were recorded. The store used an ANOVA to test if the mean sales for each credit card were equal. What are the degrees of freedom for the F-statistic?

• A)18 in the numerator,3 in the denominator
• B)3 in the numerator,18 in the denominator
• C)2 in the numerator,15 in the denominator
• D)6 in the numerator,15 in the denominator

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Definitions:

Increased Intracranial Pressure

A condition where the pressure within the skull exceeds the normal range, potentially leading to brain damage or death.

Mechanical Ventilation

A medical intervention that uses a machine to assist or replace spontaneous breathing by moving air into and out of the lungs.

Congestive Heart Failure

A chronic condition where the heart doesn't pump blood as well as it should, leading to symptoms like shortness of breath, fatigue, and swelling.

Hirschsprung Disease

A congenital condition where nerve cells are missing in the muscles of part or all of the large intestine, causing difficulties with passing stool.