This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
Appropriate statistical test to compare two propoions 
Select and explain. 
A. Chi-square test, B. Student's t-test, C. Odds ratio, D. Correlation coefficient
A: Chi-square test
Answer: A: Chi-square test 
Explanation: Ref:Parks 23rd edition pg 852 Here, propoion is a Qualitative measure, so we use Chi-square. Tests of significance: Qualitative: Chi- square : 2 or more than 2 groups Mc Nemar test : 1 group. ( before and after intervention) Quantitative: Paired T test: 1 group Student T test/ unpaired T test: 2 groups Anova: more than 2 groups.