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
Normal standard detion true is- 
Select and explain. 
A. Mean = Median, B. Mean > Median, C. Median > Mean, D. Mode > Mean
A: Mean = Median
Answer: A: Mean = Median 
Explanation: 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