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
[{'content': "While testing a hypolidemic drug, serum lipid levels were tested both before and after its use. Which test is best suited for the stastical analysis of the result- \nSelect and explain. \nA. Paired T test, B. Student's test, C. Chi square test, D. None of the above", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref:Parks 23rd edition pg 852 Here measurement is Quantitative and involves only a single group (before and after intervention) . So we use paired T test. 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.', 'role': 'assistant'}]