This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': 'If a 95% confidence Interval for prevalence of cancer smokers aged > 65 years is 56% to 76%, the chance that the prevalance could be less than 56% is ? \nSelect and explain. \nA. Nil, B. 44%, C. 2.50%, D. 5%', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., 2.5% In this questions: 56 to 76 confidence interval covers 95% (2SD) of values. That means 5% of values will fall outside the range of 56-76 --4 2.5% values will be below 56 and 2.5% values will be above 76.", 'role': 'assistant'}]