Question: A researcher suspects that there might be a relationship between obesity and smoking. 200 participants are classified into four groups according to their BMI and

A researcher suspects that there might be a relationship between obesity and smoking. 200 participants are classified into four groups according to their BMI and smoking behaviors, yielding the following frequencies: Smoking Behavior Marginal Total Obesity Nonsmoker Smoker Obese (BMI>=30) 30 90 120 Not Obese (BMI<30) 50 30 80 Marginal Total 80 120 200 What are the degrees of freedom

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