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': 'Normal standard detion true is- \nSelect and explain. \nA. Mean = Median, B. Mean > Median, C. Median > Mean, D. Mode > Mean', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Repeated question the standard detion (SD, also represented by the Greek letter sigma s or the Latin letter s) is a measure that is used to quantify the amount of variation or dispersion of a set of data values. A low standard detion indicates that the data points tend to be close to the mean (also called the expected value) of the set, while a high standard detion indicates that the data points are spread out over a wider range of values', 'role': 'assistant'}]