A Large Department Store Examined a Sample of the 18

question 26

Multiple Choice

A large department store examined a sample of the 18 credit card sales and recorded the amounts charged for each of three types of credit cards: MasterCard, Visa and American Express. Six
MasterCard sales, seven Visa and five American Express sales were recorded. The store used
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) 0 in the numerator, 15 in the denominator
• E) None of these statements are true

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Definitions:

Health Department

A government agency at various levels (local, state, national) responsible for public health policies, regulations, and community health services.

Cross-tabulation

A statistical tool used to analyze and understand the relationship between two categorical variables by organizing data into a table.

Food Poisoning

An illness caused by eating contaminated food, often characterized by gastrointestinal symptoms like vomiting and diarrhea.

Epidemiologist

A scientist who studies the patterns, causes, and effects of health and disease conditions in defined populations.