This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Normal Distribution, Skewed Distributions, Subject name: Social & Preventive Medicine
[{'content': 'In a Standard detion of 2, confidence limit is \nSelect and explain. \nA. 68.30%, B. 95.40%, C. 99.70%, D. 76.20%', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Normal Curve This is a normal distribution curve in which 95% of the population falls between -2SD and +2SD. Confidence limits are the upper and lower boundaries of a confidence interval. Confidence interval is the interval within which a parameter value is expected to lie with ceain confidence levels, as could be revealed by repeated samples.', 'role': 'assistant'}]