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': '95% of the values in the distribution corresponds to \nSelect and explain. \nA. l.S.D, B. 2. S. D, C. 3. S.D, D. 4. S.D', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. (2 SD) (701 Park 19th) (751-Park 20th)In normal distribution curve* 1 Standard deviation =68% of value.* 2 Standard deviation =95% of value* 3 Standard deviation =99.7% value* Standard normal curve - Smooth bell shaped, perfectly symmetrical**1. Total area of the curve is 1*2. Its mean is Zero3. Standard deviation is 14. The mean, median and mode all coinside**', 'role': 'assistant'}]