In a study of 1040 subjects researchers found that the


In a study of 1,040 subjects, researchers found that the prevalence of coronary heart disease increased as the number of cups of coffee consumed per day increased.29

(a) What is the explanatory variable?

(b) What is the response variable?

(c) What are the observational units?

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Electrical Engineering: In a study of 1040 subjects researchers found that the
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