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': 'Not true about chi- square test is- \nSelect and explain. \nA. Tests the significance of difference between two propoions, B. Tells about presence or absence of an association between two variables, C. Directly measures the strength of association, D. Can be used when more than two groups are two be compared', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ref: Parks 23rd edition pg 852 Chi-square test offers an alternate method of testing the significance of difference between two propoions. Advantage: it can also be used when more than 2groups are to be compared.', 'role': 'assistant'}]