A researcher wants to compare the proportion of smokers in two independent groups. Which test is most appropriate?
Answer and explanation
Correct answer: A. Chi-squared test
- Step 1: Smoking status is a categorical variable and the groups are independent. Step 2. Chi-squared (or Fisher's exact for small numbers) compares proportions between groups. Answer: Chi-squared test. Why not the others: A paired t-test compares paired continuous measurements. Correlation relates two continuous variables. ANOVA compares means of continuous data.
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